Answer:
C. 640
Explanation:
The minimum force would occur in a frictionless environment and act parallel to any abutting surface.
F = ma = 160(4) = 640 N
While you push a box you begin to decrease the force you are exerting on the box. When will the box reach equilibrium?
A. When the force you are exerting on the box is equal to 0.
B. When Fyou on box = -Fbox on you.
C. When the force of the box becomes Fyou on box < Fbox on you
D. The box will never reach equilibrium.
The application of a force on the box overcomes the friction and causes the box to accelerate
While the force is decreasing, the box will stabilize;
B. When [tex]\underline{F_{you \, on \, box} = -F_{box \, on \, you}}[/tex]Reason:
Newton's third Law of Motion states that action and reaction are equal in magnitude and opposite in direction
When the box is pushed with a force, [tex]F_{you \, on \, box}[/tex], the reaction of the box of mass, m, is as follows;
[tex]F_{you \, on \, box}[/tex] = [tex]F_{friction}[/tex] + m × accelerationWhere;
[tex]F_{friction}[/tex] = [tex]-F_{box}[/tex] for example
The negative sign is due to the direction of the friction force, or [tex]F_{box}[/tex] is opposite to the direction of the applied force
When the force is decreased to F₂ = [tex]F_{you \, on \, box}[/tex], such that we have;
[tex]F_{you \, on \, box}[/tex] = [tex]-F_{box \, on \, you}[/tex] , which is the condition for equilibrium, and the net
force is zero and according to Newton's first law of motion, the box moves
at constant speed no acceleration
Therefore the box will reach equilibrium when;
[tex]\mathbf{\underline{F_{you \, on \, box} = -F_{box \, on \, you}}}[/tex]Learn more about equilibrium here;
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Answer:
When the force you are exerting on the box is equal to 0
Explanation:
Once again expert verifiers are sabotaging people here is the actual answer.
The muscular system consists of exclusively this kind of tissue.
Answer:B
Explanation:
Each muscle or organ is composed of skeletal muscle tissue, connective tissue, nerve tissue, and blood or vascular tissue. Thus, the muscular system consists of all types of tissue.
What is the muscular system?The Muscle fibers are specialized cells that make up the muscular system. Its ability to contract is its main characteristic. Muscles that are attached to bones, internal organs, or blood arteries are what move things. Muscle contraction is the primary cause of almost all bodily movement. A skeletal muscle on its whole is a part of the muscular system.
Muscle cells, also known as muscle fibers or monocytes (mostly in skeletal and cardiac muscle), make up the majority of the organs that make up muscles (mainly in smooth muscle).
By contracting and pushing food to the small intestine through a process known as peristalsis, the muscles surrounding the stomach aid in the flow of food through the digestive system.
To know more about the Muscular system:
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Help.. mee..
;-;
Dont answer if you dont know I dont want to fail this
Answer:
It would be B because the warm air heats up and then burns the marshmallow. And the heat and the marshmallow were touching each other
Explanation:
Answer:
its B because both objects are touching, every other option the heat moves through the air
When the sun heats up the suface of the water, the water
Answer:
In the water cycle, evaporation occurs when sunlight warms the surface of the water. The heat from the sun makes the water molecules move faster and faster, until they move so fast they escape as a gas. Once evaporated, a molecule of water vapor spends about ten days in the air.
Explanation:
A car drives around a racetrack for 30 seconds. What do you need to know to
calculate the instantaneous speed of the car at a given point?
A. The total displacement of the car
B. The time needed to drive 1 lap
C. The slope of the car's position-time graph
D. The average speed of the car
Answer: the slope of the cars position-time graph
Explanation:
Just took the test
a dishwasher has a wattage of 1,500 watt. It takes the dishwasher 100 minutes to complete one wash cycle. How much energy does the dishwasher use to complete one wash cycle
Answer:
ima be honest i don't know the answer im just doing this so brainly can leave me alone sorry lol
Explanation:
blah blah blah blah blah blah blah yada yada yada i answerd this question i guess
A 5.0 kg cannonball is fired horizontally at 68 m/s from a 15-m-high cliff. A strong tailwind exerts a constant 12 N horizontal force in the direction the cannonball is traveling. What is the extra distance (d)?
Answer:
3.7 m
Explanation:
ASSUMING this means extra distance beyond where the cannonball would land WITHOUT the wind assistance but in general ignoring air resistance. Hmmmmmm...tricky
The ball drops from vertical rest to ASSUMED horizontal ground 15 m below in a time of
t = √ (2h/g) = √(2(15)/9.8) = 1.75 s
Without the tail wind, the ball travels horizontally
d = vt = 68(1.75) = 119 m
The tailwind exerts a constant acceleration on the ball of
a = F/m = 12/5.0 = 2.4 m/s²
The average horizontal velocity during the flight is
v(avg) = (68 + (68 + 2.4(1.75)) / 2 = 70.1 m/s
so the distance with tailwind is
d = v(avg)t = 70.1(1.75) = 122.675 m
The extra distance is 122.675 - 119 = 3.675 = 3.7 m
bus travels 6 km east and then 8 km south. What is the displacement?
Answer:
d = √(6² + 8²) = 10 km
Explanation:
displacement is a vector and subject to vector addition.
1 oto chạy trên 1 đoạn đường thẳng từ địa điểm A đến địa điểm B phải mất 1 khoảng thời gian t, Tốc độ của oto trong nửa đầu của khoảng thời gian này là 60km/h và trong nửa cuối là 40km/h. Tính tốc độ trung bình của oto trên cả đoạn đường AB
Answer:
Explanation:
t = (½d)/60 + (½d)/40
t = (½d)/60(2/2) + (½d)/40(3/3)
t = (½d)2/120 + (½d)3/120
t = (½d)5/120
t = (½d)/24
t = d/48
v = d/t
v = d / (d/48)
v = 48 km/h
A school bus moves at speed of 35 mi/hr for 20 miles. How long will it take the bus to get to school
Answer:
Explanation:
Assuming school is at the end of the 20 mile route, then
20 mi / 35 mi/hr = 0.57142...hr
which is about 34 minutes 17 seconds
Everytime a train passes Ms. Lindsey's house, one specific item on her dresser rattles. Use physics to explain why this occurs.
Answer: gravity
Explanation: the moving and sifting around in the train
An apple falls from a tree and 2.5 seconds later hits the ground. How fast is the apple falling when it hits the ground? Neglect air resistance.
O 2.5
05
O 20
0 25
Answer:
9.8 m/s²Explanation:
Since the ball rises for 2.5 s, the time to fall is 2.5 s. The acceleration is 9.8 m/s2 everywhere, even when the velocity is zero at the top of the path. Although the velocity is zero at the top, it is changing at the rate of 9.8 m/s² downward.the atmosphere of mercury and mars are very thin.what effects does the thin atmosphere on the temperature on the surface of this planet?
Answer:
The effects of the thin atmosphere are that the surface of the planet is going to be much hotter and not only that but also more radioactive than a planet with a thicker atmosphere. The thick atmosphere on other planets prevents a lot of radiation from going straight to the surface of the planet.
Explanation:
Which kind of precipitation is formed, in part, by wind?
A. Rain
B. Snow
C. Sleet
D. Hail
Answer:
Rain
Explanation:
Imagine that you are immersed under a beautiful cosmic meteor shower. Which
instrument would BEST help you view the largest portion of the sky?
refracting telescope
binoculars
sextant
compound telescope
Answer:
binoculars
Explanation: I am taking astronomy
Answer: B) binoculars just took the test
Explanation:
A canoe is designed to have very little drag when it moves along its length. Riley, mass 62 kg, sits in a 21 kg canoe in the middle of a lake. She dives into the water off the front of the canoe, along the axis of the canoe. She dives forward at 1.7 m/s relative to the boat.
1) Just after her leap, how fast is she moving relative to the water?
2) Just after her leap, how fast is the canoe moving relative to the water?
(1) Riley velocity relative to the water after she jumps is 1.7 m/s.
(2) The velocity of the canoe relative to the water is 5.02 m/s.
The given parameters;
mass of Riley, m₁ = 62 kgmass of canoe, m₂ = 21 kg velocity of the Riley after jumping, v₁ = 1.7 m/s(1) Since the lake is still, her velocity relative to the water after she jumps is 1.7 m/s.
(2) Apply the principle of conservation of linear momentum;
m₁v₁ = m₂v₂
62 x 1.7 = 21v₂
105.4 = 21v₂
[tex]v_2 = \frac{105.4}{21} \\\\v_2 = 5.02 \ m/s[/tex]
Thus, after her leap, the velocity of the canoe relative to the water is 5.02 m/s.
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FIGURE 1 shows a 10 kg uniform metal rod with 2.0 m long pivoted at its centre C. A 20 N force is exerted on the rod, 0.5 m from point C. If the rod is in equilibrium, determine the
a) force, F needed.
b) magnitude and the direction of the force exerted at point C.
Answer:
Explanation:
Assuming we are looking parallel to a horizontal pivot pin with positive UP to the top of the picture, and the 20 N force acts perpendicular to the rod.
Sum moments about C to zero assume CW is the positive moment.
The rod mass causes no moment because there is no moment arm about C.
Fsin50[1.0} - 20[0.5] = 0
F = 10/sin50
F = 13 N
Summing vertical forces to zero With R being the pin reaction at C
Ry - F - 20sin50 - mg = 0
Ry = 13 + 20sin50 + 10(9.8)
Ry = 126.32 N
Summing horizontal forces to zero assuming a right directed force is positive.
Rx + 20cos50 = 0
Rx = -12.855...
R = √(-12.855² + 126.32²) = 126.972
R = 127 N
θ =arctan(126.32/-12.855) = 95.8107... = 5.8° CCW from UP
EMERGENCY! PLS HELP
An isotope of Cesium-137 has a half-life of 30 years. If 6 grams of Cesium-137 decays over a period of 90 years, how many grams of Cesium would remain?
Answer:
0.75 grams
Explanation:
Today we have 6 grams
In 30 years, 3 grams remain
In 60 years 1.5 grams remain
in 90 years 0.75 grams remain
mathematically It would look like this
m = 6(0.5⁽ⁿ/³⁰⁾) where n is number of years
A 20-ohm resistor is connected to a 10 V battery. The 20-ohm resistor is replaced with a smaller resistor. What happens to the voltage across the resistor?
Explanation:
It is given that,
Resistance, R = 20 ohms
Voltage of the battery, V = 10 V
We can find current flowing through the circuit using Ohm's law as follows :
V = IR
\begin{gathered}I=\dfrac{V}{R}\\\\I=\dfrac{10}{20}\\\\I=0.5\ A\end{gathered}I=RVI=2010I=0.5 A
It can be seen from the Ohm's law, that the current is directly proportional to the voltage. It means that if the battery is replaced by a battery that provides a larger voltage, the current through the circuit will be more than 0.5 A i.e. it increases
A dog is running at an initial speed of 10 m/s. He covers 50 m in 4 seconds. What is the acceleration of the dog?
a.
1.25 m/s2
b.
1.04 m/s2
c.
5 m/s2
d.
3.2 m/s2
Tarea del 21 de octubre 2021 del 5 de primaria
Answer:xss
zzz
Explanation:
zzz
What is one way we can use agriscience to affect photosynthesis and increase plant growth?
Removing excess water from the air
O Removing carbon dioxide from the air in greenhouses
Adding oxygen to the air in greenhouses
Adding water to soil in a precise way as needed
Answer:
casa. Completa las oraciones con el pronombre de objeto directo correcto, según el contexto.
1. Tu ropa está sucia. ¿Por qué no ____ lavas?
2. Ellos tienen muchos libros. ____ tienen en la estantería del despacho.
3. La casa de mi mamá tiene muchas ventanas, pero no ______ abre todos los días.
4. Profesora, Ud. debe usar la cochera. ¿ ______ve allí?
5. ¿Quieres ir al cine con nosotros? _____ llamamos antes de salir.
Why are earth, other solar system planets, and most planetary objects spherical
Answer:
A planet is round becuase of gravity
Explanation:
A planet's gravity pulls equally from all sides, gravity pulls from the center to the edge like the spokes of a bicycle wheel. This makes the overall shape of a planet sphere, which is a three-dimensional circle.
i tried but i don’t understand! please help asap!!!
Answer:
~218 electrons
Explanation:
(-3.5 * 10^-17 C)/(-1.602 * 10^-19 C) = 3.5/1.602x10^-2 = 218.47...
What is the reason for the widespread use of fins on surfaces? Group of answer choices Decreasing the rate of heat transfer from a surface by increasing the heat transfer surface area Decreasing the rate of heat transfer from a surface by decreasing the heat transfer surface area Increasing the rate of heat transfer from a surface by decreasing the heat transfer surface area Increasing the rate of heat transfer from a surface by increasing the heat transfer surface area
Answer:
ask your member
Explanation:
kayo lang din makakasagot nyan
What does democratized knowledge mean?
A. People decide together what information the public needs to
know
B. Everyone has a right to own a computer with Internet access.
C. Everyone can vote to determine what knowledge should be
shared.
D. Everyone has equal access to knowledge that they can also
contribute to
Answer:
d
Explanation:
The democratization of knowledge is the acquisition and spread of knowledge amongst a wider part of the population, not just privileged elites such as clergy and academics.
help please! ill mark brainliest!
What happens to a moving object if NO unbalanced force acts upon it?
It eventually slows down and comes to a stop.
It speeds up in the direction of motion.
It will eventually change direction.
It continues to move at the same speed.
Answer:Newton's first law of motion indicates that an objects motion or lack of motion will stay the same unless acted upon by an unbalanced force.
Explanation:
The driver of a 1,500 kg car is traveling at 25 m/s. A deer runs into the road and the driver slams on the brakes. If it takes the car 5 seconds to stop, the acceleration of the car is ____ m/s2.
a.
0.25 m/s2
b.
-0.25 m/s2
c.
5 m/s2
d.
-5 m/s2
Answer:
c.
5 m/s2
Explanation:
Δv = at
a = Δv/t
a = (0 - 25)/5
a = 5 m/s²
Look at the figure below and calculate the length of side y.
A. 8.5
B. 17
12
y
C. 6
O D. 12
45
Х
Let us remember your previous lesson on Physical Press Components! Directions: Analyze the folawna fitness components. Put a check in the box to which Physical Fitness belongs to Components Slab-Related Health Related 1. Power 2. Agility 3. Balance 5. Muscular Strength
Answer:
5 Muscular and strength