Power is rate at which energy flows: one watt = one Joule/s. omb/s. Question 1 1 pt We are informed about a particular force: "The force is inversely proportional to the cube of the distance." If the distance doubles, what happens to the force? The force decreases to one-fourth its original value. O The force decreases to one-half its original value. O The force increases to eight times its original value. O The force decreases to one-eighth its original value. O The force increases to two times its original value. O The force increases to four times its original value.

Q: A car is cruising at a constant speed of 24 m/s. If the frictional force acting on the car is 571 N,…

A: Given: Speed of car v = 24 m/s Frictional force acting on the car f = 571 N

Q: It takes 179 kJ of work to accelerate a car from 21.0 m/s to 29.7 m/s. What is the car's mass?…

A: Given, Initial speed of the car, vi = 21.0 msfinal speed of the car, vf = 29.7 mswork done to…

Q: A chain lying on the ground is 10 m long and its mass is 60 kg. How much work (in J) is required to…

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Q: A unit of power often for electric motors is the horsepower (hp), which equals 746 W. a small…

A: In the given question, We have to determine the energy delivered by the motor in one hour.

Q: Suppose that 3 J of work is needed to stretch a spring from its natural length of 24 cm to a length…

A:

Q: A forklift raises a 90.5 kg crate 1.80 m. (a) Showing all your work and using unity conversion…

A:

Q: A force F = 7.3 Ni – 4.5 Nĵ acts on an object. While this force acts, the has a displacement 7 = 1.5…

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Q: ***A spring has a natural length of 10 cm. If 10 dynes of force is required to keep it stretched 1/2…

A: When in spring if some load is applied, then it is pulled downwards to some distance which depends…

Q: You lift a 3kg pumpkin to a height of 0.80 m to check it out. How much work do you do on the pumpkin…

A: Consider the formula to obtain the value of work done is, W=mgh Here, m is the mass of the object, g…

Q: A construction worker, 20 feet up on a scaffold, lifts a 2-lb rope hand over hand up to the scaffold…

A: Given : Weight of Block=m=8 lb Weight of rope=M=2 lb Length of rope=l=20 feet Height of the…

Q: The force, ? required to compress a spring by a distance ? meters is given by ?=4? newtons. Find the…

A: Given Data : The force required to compress the spring is given as F = (4x)N The initial position of…

Q: A 45 kg athlete runs up a flight of stairs in 4 s. His net upward displacement is 9 m. What average…

A:

Q: Using 1000. J of work, a small object is lifted from the ground floor to the third floor of a tall…

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Q: A 125-lb student races up stairs with a vertical height of 4.0 m in 5.0 s to get to a class on the…

A: The force due to gravity is, F=mg=125 lb1 kg2.2 lb9.8 m/s2=556.8 N The work done by the force is,…

Q: A leamer weighing 800N runs up 20 stairs each 20cm high in 4 seconds. How much power is exerted by…

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Q: A worker pushes a wheelbarrow with a horizontal force of 240 N over a level distance of 5.0 m. If a…

A:

Q: A 430g book is dropped froma height of 1.9m. What is the kinetic energy of the book at the moment it…

A: Kinetic energy gained equals the change in potential energy. Ekinetic=Utotal-Uhalfway=mgh-mgh2=mgh2

Q: A 5.0-kg rock falls off of a 10 m cliff. If air resistance exerts a force of 10 N, what is the…

A: mass, m = 5 kg  height, h = 10 m resistive force, f = 10 N  initial velocity, u = 0 m/s

Q: A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic power, in kW…

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Q: car (120 kg) accelerates from the rest to 25 m/sec in 11 sec, what is the value of the generated…

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Q: If gravity is pulling a 0.15 kg ball down 2.0 meters, what is the magnitude of the force doing work…

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Q: Calculate the work done in lifting a 500-N barbell 2.2 m above the floor. (What is the gain of…

A: Given: Force, F = 500 N Height, d = 2.2 m

Q: It takes 3 s for 25 g car to go down a 100 incline for 1 m. ? How much work was done by friction?…

A: Given : Time, t = 3 s mass of car, m = 25 g  = 25*10-3 kg Inclination angle, θ = 100 Distance,x = 1…

Q: What is the equation for horizontal work?   Rogelio pushes a book 3 m across the table. If he uses…

A: Work done = force × displacement

Q: You push down on a 4.0 N box against the floor for 2 minutes. How much work was done? How much power…

A: Answer Given  Weight of box w = 4 N Time t = 2 minutes

Q: A crate that has a mass of 20 kg is raised 10 meters above the ground. How much potential point…

A: Potential energy comes due to height only. Its value is given by  P.E.- mgh  m - mass of the object…

Q: You move a 25 N object 5.0 meters. How much work did you do?

A: Given: Force, F =25 N Distance d=5.0m

Q: How much work must you do to push a 12 kg block of steel across a steel table at a steady speed of…

A: mass of block of steel (m) = 12 kg constant speed (v) = 1.3 mstime (t) = 7.7 seconds μk = 0.6

Q: Imagine a spring that doesn't follow Hooke's Law, but instead requires a force…

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Q: MY NOTES ASK YOUF A 390-lb gorilla climbs a tree to a height of 24 ft. Find the work done (in ft-lb)…

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Q: A 95 kg man runs up a 20 m high stairs at a constant speed. If it takes him 8 seconds to reach the…

A: Given The mass of the man is m=95 kg. The height of the stairs is h=20 m. The time is taken by the…

Q: A force produces power P by doing work W in a time t. What power will be produced by a force that…

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Q: A force of 1300 lb compresses a spring from its natural length of 18 in. to a length of 10 in. How…

A: Given Applied force is F=1300 lb Compression of the spring in the first case is ∆x1=18-10 in=8 in…

Q: How much work would a child do while pulling a wagon a distance of 4.9 m with a 39 N force?…

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Q: 4. A horse performs 15,000 J of work pulling a wagon for 20 seconds. What is the horse's power A 750…

A: Power is defined as the ability of a body to do work and is given by, PowerP = Work doneWTime takent…

Q: A 73 kg athlete runs up a flight of stairs in 5 s. His net upward displacement is 7 m. What average…

A: Write the given values with the suitable variables. m=73 kgt=5 sd=7 m Here, m is the mass, t is the…

Q: A spring has a natural length of 6 m. If a 4-N force is required to keep it stretched to a length of…

A: Given value--- Applied force = 4 N. change in length = 10 m - 6 m = 4 m. We have to find--- how…

Q: A man pushes a lawn mower on a level lawn with a force of 193 N. If 51% of the force is directed…

A: We know that work done W=Fd

Q: JC races with his classmates by running up the stairs to the top of the school building 15.8 m high.…

A: Given data: Height (h) = 15.8 m Time taken by JC = 3.1 minutes Time taken by LJ = 3.28 minutes Mass…

Q: Measurements in the 1800s showed that a draft horse could provide a maximum steady output power over…

A: Given: The power of one horse (P) = 750 W. Mass of a dog (md) = 38 kg. Drag force (F) = 60 N. Steady…

Q: Consider the figure below: Fapp = 120 N m = 30.0 kg f = 5.00 N d = 0.800 m w N Calculate the total…

A: Given data The force applied is given as Fapp = 120 N. The frictional force is given as f = 5 N.…

Q: It takes 3 s for 25 g car to go down a 10 degree incline for 1 m. ? How much work was done by…

A:

Q: The unit of horsepower was defined by considering the power output of a typical horse. Working-horse…

A: Given: The mass of the horse is 1200 lb. The speed is 3.0 mph. The percentage of weight is 10%.

Q: A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the output power, in kW…

A: Given data: Mass (m) = 75 kg Initial velocity (v0) = 0 m/s Final velocity (v) = 8.0 m/s Time (t) =…

Q: How far must you stretch a spring with k = 1700 N/m to store 230 J of energy? Express your answer in…

A: Data Given ,  Potential energy of spring ( P.E ) = 230 J k = 1700 N/m We know that ,  Potential…

Q: A boy lifts a 30.0 N dragon 2.0 meters above the ground. How much work did the boy do on the dragon?…

A: Given data: Weight of dragon (w) = 30 N Height form the ground (h) = 2.0 m Need to determine the…

Rotational Equilibrium And Rotational Dynamics

In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics. 

Equilibrium of Forces

The tension created on one body during push or pull is known as force.