Calculate the velocity of a car traveling 0.75ters in 2.5 seconds using
meters/second (m/s)

From the information provided, the velocity after 2 seconds is  11 m/s.

From the equations of motion;

v = u + at

Where;

v = final velocity

a = acceleration

t = time taken

The initial velocity of the bike was 7 m/s and its acceleration is  2 m/s2. This change occurred within a time of 2 seconds.

Hence;

v = 7 + 2(2)

v = 11 m/s

The velocity after 2 seconds is  11 m/s.

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The speed of the ball when it returns to the same horizontal level is 8 m/s.

The given parameters;

During the motion of a projectile, the speed of the projectile reduces as the projectile moves upwards and eventually becomes zero at the maximum height.

As the projectile moves downwards, the speed of the projectile starts to increase and it will become maximum (equal to the initial speed) before the projectile hits the ground.

Thus, we can conclude that the speed of the ball when it returns to the same horizontal level is 8 m/s.

Learn more here:https://brainly.com/question/16272865

Answer:

100 m/s ÷ 8 = 12.5 m/s

Explanation:

You must put multiply (÷)

La altura máxima alcanzada por el bloque es de 14.471 metros.

En esta pregunta asumimos que la altura inicial del bloque es igual a tres metros por encima del la altura de referencia y la altura final puede ser determinada mediante el principio de conservación de la energía, en cuyo caso, la suma de la energía cinética traslacional inicial ([tex]K[/tex]) y la energía potencial gravitacional inicial ([tex]U_{o}[/tex]), ambos en joules, es igual a la energía potencial gravitacional final ([tex]U_{f}[/tex]), en joules. Matemáticamente hablando, tenemos la siguiente expresión:

[tex]U_{o}+K = U_{f}[/tex]

[tex]m\cdot g\cdot z_{o} + \frac{1}{2}\cdot m\cdot v^{2} = m\cdot g \cdot z_{f}[/tex] (1)

Donde:

A continuación, despejamos la altura final del bloque:

[tex]z_{f} = z_{o}+\frac{1}{2}\cdot \frac{v^{2}}{g}[/tex] (2)

Si sabemos que [tex]z_{o} = 3\,m[/tex], [tex]v = 15\,\frac{m}{s}[/tex] y [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], entonces la altura máxima alcanzada por el bloque es:

[tex]z_{f} = 3\,m + \frac{1}{2}\cdot \left[\frac{\left(15\,\frac{m}{s} \right)^{2}}{9.807\,\frac{m}{s^{2}} } \right][/tex]

[tex]z_{f} = 14.471\,m[/tex]

La altura máxima alcanzada por el bloque es de 14.471 metros.

Invitamos cordialmente a ver esta pregunta sobre el principio de conservación de la energía: https://brainly.com/question/19561287

Answer:

hddhgdffghuhuuy680ji8fgddff dadeldhura 30x72x19 ra 30x72x19 ra samidhan 6I

Answer:

my pencil is about and 1/2 inches

i think it would be in the middle about 1 inch away  

my hypothesis was wrong he was like a 1/2 inch on one he right side and he left didn't

Explanation:

hope this helps

Answer:

m=4kg

v=3m/s

KE=1/2mv^2

KE=1/2×4×3×3

KE=18Joules

Explanation:

PLS MARK BRAINLIEST

Answer:

you must connect a radar reader under the steering wheel and clear it

Explanation:

It is important to understand the differences between physical and chemical changes. ... It helps to think of physical changes as those involving changes that don't change the make up of the substance, while chemical changes are those that create a new substance. Physical Changes involve energy.

To answer this question, it is necessary to apply the static condition from Newton´s Laws

The solution is:

Fd > Fc > Fa > Fb

From the body free diagram, and from the second Newton´s law of movement we get:

∑ Fx  = 0           F - Fr  = 0         F = Fr             Fr = μ×N

∑ Fy  = 0     N = m×g  ⇒   Therefore       Fr = μ×m×g

F = μ×m×g      g is the same in all the cases, then we just compare the products  μ×m

So when F is just greater than Fr, the body will start moving

we make a table, with values from the information table.

1.-  μ×m   =  0.5× 40  = 20

2.-μ×m   =  0.4× 80   = 16

3.- μ×m   = 0.7× 30   = 21

4.- μ×m   = 0.9× 35   = 31.5

According to the table, from highest to lowest the magnitude of the horizontal force is:

Fd > Fc > Fa > Fb

RelatedLink: https://brainly.com/question/16799228

Answer:

~3°

Explanation:

x^2 + 0.16^2 = 3^2

x^2 + 0.0256 = 9

x^2 = 8.9744

x = sqrt(8.9744) = 2.99... = ~3

Answer:

B. contains substance s that are not mixed in a specific ratio

Explanation:

the proportion of constituents in a mixture can vary

Answer:

Polonium Marked as Po with atomic number 84, is a highly radioactive heavy metal. It is arguably the most lethal known material.

Explanation:

Answer:

A.protons and neutrons in the nucleus.

Answer:

- 0.5 m/s

Explanation:

(1) Acceleration = change in velocity / time

(2) Change in velocity = (Final velocity - Initial velocity)

We know:

acceleration = 1.5 m/s/s

time = 5 seconds

final velocity = 7 m/s

x = initial velocity)

1.5 = ( 7 - x ) / 5

1.5 x 5 = ( 7 - x )

7.5 = 7 - x

x = -0.5 m/s

You can check the answer by plugging in the values to equation (1).

Explanation:

At first it is in 14m position but position doesn't matter in displacement, similar case for time taken.

So at first it travels 6m in positive direction.

So displacement= 6m

Then it travels 13 in opposite or negative direction.

So displacement = 6 -13 m = -7 m

Hope it helps ya

You're standing in the lobby of a huge building.

You go up 6 floors.

You stop and catch your breath.

You go down 13 floors.

Where do you end up ?

Answer:

There are only 38 points.

Explanation:

why are you saying 75?

Answer:

Thermal expansion ,thermal contraction

Explanation:

They are different because it has different cause and chemical reactions

thermal contraction is a chemical reaction

Answer:

IN THE EXPLANATION!!

Explanation:

Atmospheric pressure, also known as barometric pressure (after the barometer), is the pressure within the atmosphere of Earth.

Answer:

atmospheric pressure is the pressure exerted on the Earth's surface due to weight of air above it.

Answer:

The acceleration of the sled is 1.584 m/s².

Explanation:

Friction always occur when two surfaces slide across one another. For example, if we push an object and it starts moving, we can say there's a kinect (dynamic) friction force between that object and the surface under.

Now, let's solve the problem.

First, we've got to write the data down.

[tex]\bullet \quad m=300\,kg\\\\\bullet \quad F=828\,N\\\\\bullet \quad \mu_k=0.120[/tex]

Sketch a picture of the problem and point all forces acting on the sled (see attached).

Apply Newton's Second Law Of Motion:

[tex]F_{net}=m\cdot a[/tex]

Let's set our reference system positive to the right. Above equation becomes:

[tex]F-f_k=m\cdot a[/tex]

where [tex]f_k[/tex] is the kinect friction force.

Looking up free body diagram, we can see support force equals the weight of the sled, so that we can write:

[tex]F-\mu_k\cdot m \cdot g=m \cdot a[/tex]

Solving for a:

[tex]a=\dfrac{F-\mu_k \cdot m \cdot g}{m}[/tex]

Let's take 9.8 m/s² for the acceleration of gravity and plug the data on the equation.

[tex]a=\dfrac{828-(0.120)\cdot 300\cdot(9.8)}{300}[/tex]

[tex]\therefore \boxed{a=1.584\,m/s^2}[/tex]

Conclusion: the acceleration of the sled is 1.584 m/s².

Keep learning with this link:

Friction force

https://brainly.com/question/25123392

Happy studying!

Brainly Team

Answer:

B.

Explanation:

w=mg

g=10m/s

hope this helps

This question involves the concepts of centripetal force, range of projectile and projectile motion.

The magnitude of centripetal force is "2812.8 N".

First, we will find the velocity of the ball by using the formula of the range of the projectile.

[tex]R = \frac{v^2Sin2\theta}{g}[/tex]

where,

R = range of projectile = 86.75 m

v = speed = ?

θ = launch angle = 47.9°

g = acceleration due to gravity = 9.81 m/s²

Therefore,

[tex]86.75\ m = \frac{(v)^2Sin(2)(47.9^o)}{9.81\ m/s^2}\\\\v = \sqrt{\frac{(86.75\ m)(9.81\ m/s^2)}{Sin95.8^o}}[/tex]

v = 29.25 m/s

Now, we will use the formula to find out the centripetal force:

[tex]F_c = \frac{mv^2}{r}[/tex]

where,

[tex]F_c[/tex] = Centripetal Force = ?

m = mass of the ball = 7.3 kg

v = speed = 29.25 m/s

r = radius = 2.22 m

Therefore,

[tex]F_c = \frac{(7.3\ kg)(29.25\ m/s)^2}{2.22\ m}[/tex]

Fc = 2812.8 N = 2.812 KN

Learn more about centripetal force here:

https://brainly.com/question/11324711?referrer=searchResults

true North is fixed point on the globe

magnetic North is the direction that a compass needle points to as it aligns with the earths magnetic field and what is interesting is that the magnetic North pole shifts and changes over time in response to change in the earth's magnetic core

Answer:

plz mark me brianliest I really want it (puppy eyes) plzzzzzz

Explanation:

Like olfactory cells that detect odors, auditory receptor cells (also called hair cells) are recessed from the surface of the body. ... Sound waves are converted into vibrations in a fluid in the inner ear, and these vibrations indirectly move the hair cells, which then send electrical signals to the brain.

Answer:

The box gains 3200 J of kinect energy.

Explanation:

Kinect energy is the energy of an object has because of its motion. Almost anything that has mass and it's in motion has kinect energy. Examples:

Also known as the principle of work and kinect energy, it states that the work done by all forces acting upon an object equals the change of its kinect energy.

For example, if you pull a box, then you're exerting a force on it and it moves forward. Since the box has mass and it's in motion, you have changed its kinect energy.

Solution:

Write the data down:

[tex]\bullet \quad \mathsf{m=50\,kg}\\\\\bullet \quad \mathsf{F=400\,N}\\\\\bullet \quad \mathsf{d=8\,m}[/tex]

Apply work energy theorem:

[tex]\mathsf{W}= \Delta\mathsf{K}[/tex]

The amount work done equals the change of kinect energy:

[tex]\mathsf{W}=\mathsf{K-K_o}[/tex]

Since the block is at rest at the beginning, so it has zero initial kinect energy:

[tex]\mathsf{W}=\mathsf{K-0}\\\\\\\mathsf{W}=\mathsf{K}[/tex]

Now, apply the formula for work to the left hand side of the equation:

[tex]\mathsf{F\cdot d}=\mathsf{K}\\\\\\\mathsf{400\cdot 8}=\mathsf{K}\\\\\\\therefore \boxed{\mathsf{K=3200\,J}}[/tex]

Conclusion: the box has gained 3200 J of kinect energy.

Happy studying!

Brainly Team

Answer:

it References the position

Explanation:

Displacement is defined to be the change in position of an object.

And the treasure can't move by itself because its an object (and objects don't move).

Answer: There would be 20 electrons.

Explanation: Remember the electrons number is the same as the atomic number.

Answer:

b

Explanation:

a,f,,and g is correct because it is indicated that object moving forward