Why is torque greatest at 90 degrees?

Explanation:

Distance is 250m

Time is 50sec

Formular

Speed= distance/time

Speed=250/50

Speed is 5m/s

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Answer:

[tex]\boxed {\boxed {\sf 5 \ m/s}}[/tex]

Explanation:

Speed is the rate an object moves. It is found by dividing the distance by the time.

[tex]s=\frac{d}{t}[/tex]

Kenny and Chris walked a distance of 250 meters in 50 seconds. So:

Substitute the values into the formula.

[tex]s=\frac{250 \ m}{ 50 \ s}[/tex]

Divide.

[tex]s= 5 \ m/s[/tex]

Kenny and Chris had an average speed of 5 meters per second.

Answer:

Not including a sedimentary cover of variable thickness and composition, the oceanic crust consists of three layers: (1) a relatively thin uppermost volcanic layer of basaltic lavas known as mid-ocean ridge basalts (MORB) erupted on the seafloor; (2) a thicker layer of more coarsely crystalline, intrusive basaltic 

A body's mass is the total amount of its material. Gravitational pull on a body is represented by weight.

The relationship between mass and weight Mass is a measure of inertia, whereas weight is a measure of force.

Both of these names are frequently used in the same sentence. Calculating how much matter a body contains requires knowing its mass.

Weight is a unit of measurement for the force that gravity's acceleration has on a mass.

Weight is a measurement of how the force of gravity works upon a mass, whereas mass is a measure of the amount of matter in a material.

In order to determine how much matter a body contains, we need to use its mass.

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The coefficient of static friction between the crate and the floor is calculated to be 0.275.

The frictional force when an object moves on the horizontal surface is given as,

Ff = μ N

where, N is the normal force

μ is the coefficient of static or kinematic friction

If no forces other then the weight and the normal are acting upon the y-direction, then the weight and the normal force are equal in magnitude.

N = W = m g

Given that,

Mass of the crate = 26 kg

Frictional force Ff = 70 N

Weight of the crate = 26 × 9.8 = 254.8 N

The normal force is 254.8 N.

The coefficient of static friction μ = Ff /N = 70/254.8 = 0.275

Thus, the coefficient of static friction between the crate and the floor is 0.275.

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The area of the piston that holds the ride is 8333,33 [tex]cm^{2}[/tex]

For hydraulic press system pressure in = pressure out

P = Pressure

F = Force

A = Area

The formula P = [tex]\frac{F}{A}[/tex]

We know F1 = 72 N, A1 = 30 [tex]cm^{2}[/tex]

                F2 = 20000 N

The area of the piston that holds the ride = A2

P 1 = P2

[tex]\frac{F1}{A1}[/tex]  = [tex]\frac{F2}{A2}[/tex]

[tex]\frac{72 N}{30 cm^{2} }[/tex]   =  [tex]\frac{20000 N}{A2}[/tex]

A2 = 20000 N : ( [tex]\frac{72 N}{30 cm^{2} }[/tex] )

A2 = ( 20000 N x 30 cm2 ) : 72 N

     = 8333,33 cm2

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The final velocity of the freight train is 27 m/s that accelerates at a rate of 0.050 m/s2 for 8.0 min, starting with an initial velocity of 3.0 m/s.

Information given:

Acceleration is 0.050 m/s²

Time is 8.0 min

Initial velocity is 3.0 m/s

We apply the resulting equations for rectilinear motion at constant acceleration to this problem.

a = (v - u)/t

where the,

a is acceleration

u and v are the initial and final velocities, respectively

s is the distance

t is the time

Substituting the values in the equation:

The solution is as follows:

a = (v - v₀)/t

0.050 m/s² = (v - 3 m/s)/(8 min * 60 s/1 min)

Time: 480 sec

Solving for v,

24=v-3

v=27 m/s

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The gravitational force of attraction between them is 3.56 * 10⁻⁴ N

F = G*M1M2/d²,

where G = 6.67 * 10⁻¹¹ Nm²Kg⁻²,

M1 = 8000Kg and M2 = 1500 Kg,

F =  6.67 * 10⁻¹¹ * 8000 * 1500 / (1.5)² F = 3.56 * 10⁻⁴ N

The gravitational force of attraction between them is 3.56 * 10⁻⁴ N.

The universal gravitational law of Newton. According to this law, every body in the universe is attracted to every other body with a force that is inversely proportional to the square of the distance between them and proportional to the product of their masses.

Therefore, The gravitational force of attraction between them is 3.56 * 10⁻⁴ N.

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Answer:

(a) X- axis represent (1/P) inverse of pressure

(b) Y-axis represent (V) volume

Explanation:

Boyle's Law States that at constant temperature, the volume of a fixed mass of gas is inversly proportional to its pressure. It can be expressed mathematically as

V α 1/P

VPα1

removing the proportionality sign and introducing a constant

VP = k

V₁P₁ = V₂P₂

Where V₁ and V₂ are initial and final volume respectively, P₁ and P₂ are initial and final pressure respectively.

If the graph for Boyle's law is straight line through the origin,

(a) X-axis represent (1/P) inverse of pressure

(b) Y- axis represent (V) volume.

Answer:

I think the correct answer is the skier at the top.

Explanation:

cause potential energy is equal to mgh.

here mass and gravitational acceleration is same for all 3, but the top fellow has more height

Answer: The length of the pendulum is approximately 2.495 meters.

Explanation:

The period of a simple pendulum is the time it takes for the pendulum to swing back and forth through one full oscillation. The period of a simple pendulum is related to the length of the pendulum and the acceleration due to gravity (g) by the formula:

Period = 2 * pi * sqrt(length / g)

In this case, you are given that the period of the pendulum is 3 seconds and the value of g is 9.98 ms-2. You can use these values to solve for the length of the pendulum using the formula above.

Substituting in the values given, you get:

3 = 2 * pi * sqrt(length / 9.98)

Solving for length, you get:

length = (3 / (2 * pi))^2 * 9.98

= 0.5^2 * 9.98

= 0.25 * 9.98

= 2.495

Therefore, the length of the pendulum is approximately 2.495 meters.

According to the given statement The ships average acceleration is 2790 km/hr².

Rate of change in both speed and direction of motion over time. A point or object going straight forward is accelerated when it accelerates or decelerates. Even though the speed is constant, motion on a circle accelerates because of direction is always shifting

We know that from newton's equation,

v² + u² = 2as

S = ut + 0.5 at²

Where, v = final speed

           u = initial speed

           a = acceleration

           S = distance covered

            t = time taken

Given, u = 0

So the equations becomes:

v² = 2as

S = 0.5 at²

Using these equations we get:

v² = 2a(0.5)at²

v² = a²t²

v = at

v/t = a

Given,  v = 93 km/hr

          t = 2 min = 2/60 hr

Putting these values in above equation we get, a = 2790 km/hr²

So, the ships average acceleration is 2790 km/hr²

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A. The nature of the image of 5th Avenue in the mirror sculpture is that it is a virtual, upright, and smaller image. This is because the concave mirror is used to reflect light outwards, creating a virtual image that cannot be projected onto a screen.

B. The property of concave mirrors that is utilized for using them as shaving mirrors is their ability to form a smaller, magnified image. This is because concave mirrors have a negative focal length, which causes light rays to diverge and form a smaller image that is closer to the mirror.

C. To determine the focal length of the mirror, we can use the formula 1/f = 1/u + 1/v, where f is the focal length, u is the object distance (38 meters), and v is the image distance (unknown). We know that the image size is 1/5 the size of the object, so we can set v = -5u (since the image is virtual and inverted). Substituting these values into the formula and solving for f, we get f = -(5u^2)/4 = -(5(38^2))/4 = -4725/4 = -1181.25 meters.

D. To estimate the image size of the 270 meter tall Rockefeller Centre, we can use the formula: h' = -h * (u/f) where h' is the image height, h is the object height (270 meters), u is the object distance (100 meters) and f is the focal length (10 meters). Substituting these values in the formula, h' = -270 * (100/10) = -2700 meters. This means the image of the Rockefeller Centre would be 2700 meters tall, which is not possible because it's taller than the building itself. This is an indication that the image is not real and is a virtual image.

Unlike plane mirrors, spherical mirrors form images that are different in size from the size of the object. While the convex mirror forms images that are always smaller than the object, the concave mirror forms images of different sizes, depending on the position in which the object is placed on its axis.

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So because acceleration of freely falling objects is constant, if a 5 kilogram object starts free falling at rest, its acceleration at 3 seconds is g=9.8 m/s2 or 32.2 ft/s2.

As the gravitational pull of an object changes as it is moved further away from Earth or placed on another planet, so does the object's weight. Regardless of whether an object is on Planet, in deep space, or on the Moon, its mass will always be the same.

For  the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters. Notice that gravitational potential energy has the same units as kinetic energy, kg m2 / s2.

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Answer:

because potential energy is the kinetic energy something COULD have. Like when a rollercoaster is about to go over a bump, before it goes down it has potential energy, then when it goes it accelerates and creates kinetic energy. That rock be zero cause it has no potential

Explanation:

He accomplished no job. When Taylor's car broke down, he attempted to push it with 8,000 newtons of force before giving up and calling a tow truck.

The mechanical advantage is how many times a machine can multiply the force of the effort. The mechanical advantage of the machine increases when the effort force is exerted across a bigger distance.

Force multipliers are tools that lessen the force required to move an object. Force multipliers come in handy when lifting heavy objects or performing other actions that call for a lot of force.

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The friction force required to keep the car from sliding is 9000N.

mass of car, m = 1000 kg

speed , v = 30 m/s

diameter , d = 0.2 km

r = 100 m

for the car to keep from sliding frictional force is required, ff = m*v^2/r

ff = 1000 * 30^2 /100

ff = 9000 N

the friction force required is 9000 N

Simply put, an unbanked curve (or turn) is a curve that is flat on the ground (parallel to the horizontal). A force of friction applies to the car as it drives along one of these curves, keeping it rotating in a circular course.

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When feelings of anxiety and worry become excessive, out of control, and interfere with daily life, they can develop into pathological diseases called anxiety disorders. So the correct option is (c).

Anxiety disorders are characterized by feelings of apprehension and fear, which are normal human emotions. However, when these feelings become excessive, uncontrollable, and affect daily life, they can be considered a pathological disorder. Anxiety disorders can affect a person's ability to perform daily activities, such as work or school, and can also cause physical symptoms such as insomnia, muscle tension, and fatigue. These disorders can be recurrent, but they need to be excessive, uncontrollable, and affect daily life in order to be considered pathological.

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This electricity is then directed from the electric generator to electric outlets in homes

A power source that creates electricity through the use of giant magnets that are rotated to create a flow of electrons is called a generator. Generators use the principle of electromagnetic induction to convert mechanical energy (rotational energy of the magnets) into electrical energy.The electricity generated by the generator is then directed through electrical transmission lines to a substation, where it is transformed to a higher voltage level for long-distance transmission. Then it is distributed to homes and businesses through power lines and transformers.

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Answer: 1.74

Explanation: “How do you calculate the mechanical advantage of a block and tackle pulley?To calculate the mechanical advantage, we can either divide the weight of the object being lifted by the force required to lift it or we can divide the amount of rope we have to pull by the distance the object moves."If we use the rope method the mech advantage is  33.0/16.5 = 2   now if we use the forces   MA = 225/129 =1.74 <==== this is not equal to '2' as we first found due to energy being lost to friction/deformation of rope etc.              SO I would say the truemechanical advantage = 1.74  Efficiency =  1.74/2 = 87%

It is true that on looking vertically down into the water the black line appears to be closer that it really is.

A material's refractive index, which is quantified, indicates how much a light path is bent or refracted when it penetrates that material.

The critical angle for total internal reflection and the amount of light that is reflected when it reaches the contact are both determined by the index of refraction.

Due to the refraction of light rays as they pass through water and into the air, an item seen in the water typically appears to be deeper than it actually is.

Since the angle subtended by the object is greater, it "appears" larger because the light's refraction away from the normal changes the angle at which the light appears at the eye.

Thus, the given scenario is true.

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According to the given statement The temperature of the air in this experiment is dependent variable.

Material refers to a thing that something else is made out of. Material can also refer to cloth or can be used to describe something that is made of matter and exists in the physical world. Material has many other senses as a noun and an adjective.

A material is any substance that an object is made from. Glass, chalk, paper, wax, water, air, clay and plastic are all different materials. All materials are made up of matter.

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just ask safari

Explanation:

The least tension will be experienced by T3

The weight of a moving object causes tension, which is the force applied along the length of a string, rope, or cable. The force that maintains an object moving in a circular direction when it is in a vertical circular motion is called tension. Perpendicular to the circle's radius, the tension in the string is pointed in the direction of the circle's centre.

Due to the centripetal force required to maintain the object moving in a circular motion, the tension in the string varies as the object moves in a vertical circle, with the highest tension occurring at the top of the circle and the least tension occurring at the bottom. In the given case, T3 will experience the least tension during vertical circular motion, assuming that the speed of the ball remains constant. This is because T3 is the point on the string that is closest to the circle's centre, and thus is subject to the least amount of tension as the ball moves in a vertical circle.

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Answer:

Cellular respiration is a metabolic pathway that breaks down glucose and produces ATP. The stages of cellular respiration include glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation.

Explanation:

Answer:

Cellular respiration takes in food and uses it to create ATP, a chemical which the cell uses for energy. Usually, this process uses oxygen, and is called aerobic respiration. It has four stages known as glycolysis, Link reaction, the Krebs cycle, and the electron transport chain

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Explanation:

The minimum-size copper equipment grounding conductor required for the circuit is 1/0 kcmil.

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Torque is produced by multiplying the length of a lever arm by the force acting perpendicular to the lever arm. There are two conceivable orientations for the scalar quantity torque: clockwise and anticlockwise.

A torque is created when a force is applied perpendicular to a lever arm. The lever arm or moment arm is the length that extends perpendicularly from the pivot point, or the centre of rotation, to the point at which the force is applied. A torque is always defined with reference to a pivot point.

A torque multiplier multiplies the torque applied to the bolt with each gearing level. For instance, a 5:1 torque multiplier will result in an output.For example, a torque multiplier with a 5:1 ratio will result in an output at the shaft that is five times the torque, but the speed will only be one fifth of the original since no energy can be created.

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Answer:

एकच

Explanation:

डॉ बाळगू गमच दाखल सकाळी एकदिवसीय

Explanation:

the wave model of electromagnet

She moves at 6.5 m/s as her final speed after running 100 meters.

The velocity change of an object per unit of time is known as acceleration. Amounts of acceleration are measured in meters per second squared (m/s2), the SI unit of acceleration. For instance, due to Earth's gravity, a falling object accelerates at a rate of 9.8 m/s2.

A straight-line motion issue looks something like this. These formulas are used to determine the final velocity:

s = Vo*t + (1/2)*a*at2, and Vf = Vo + at

Where:

Vf = = final speed =?

1.4 m/s is the initial velocity, and 0.20 m/s is the acceleration.

100m displacement in 2 seconds.

the first equation is changed by:

100 = 1.4t + (1/2)*0.2*t^2\st = 25.388s

Vf = 1.4 + 0.2 can be used as a replacement in the second equation.

Vf = 6.5m/s

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Answer:

1) Given acceleration due to gravity as 10N/kg

N/kg is the same as m/s². From W=mg

making g subject ... you have g = W/m

where m is in kg and W is in N

hence we have N/kg

So g=10ms-²

Gravitational Potential Energy=mgh

At height 4m

PE=6 x 10 x 4

=240J.

At height 6m

PE=6 x 10 x 6

=360J.

2) KE=1/2mv²

=1/2 x 6 x 5² =75J

When the speed is doubled... it becomes 2x

so V = 2x5=10ms-¹

KE=1/2 x 6 x 10² =300J.

3) KE=1/2mv²

KE is given as 100J

mass=0.5kg

Making V the subject

you have v² =2KE/m

v²=2 x 100/0.5

v²=400

taking square root

v=20ms-¹.

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