A large hoist is lifting a 2000 kg automobile. There is a gauge on the hoist that displays its power consumption, and itreads 13, 720W. It takes 10 s to lift the car. A. How much energy did it take to lift the car? B. How high did the hoist lift the car?

Q: A 75 kg runner has a speed of 5.45 m/s. What is the runner's kinetic energy?

A: Mass of the person is m=75 kg Speed of the person is v=5.45 m/s Note: 1 N=1 kg·m/s2 1 J=1 Nm 1…

Q: How much work do the breaks on a 3200 kg car need to do in order to slow it from 30 m/s to 20 m/s?

A: Given mass m=3200Kg V1=30m/s V2 = 20m/s According to work energy theorem work done by the car is…

Q: elevator cable breaks when a 925 kg elevator is 22.5 m above the top of a huge spring (k = 8.00×104…

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Q: A car with a mass of 1290 kilograms is being driven at 17.9 meters per second when it runs into a…

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Q: You accelerate from 0-28 m/s in 6.0 seconds (about 0-60 mi/hr) in your 1300 kg car. a. Create a…

A: Given data: The initial speed is, u =0 m/s The final speed is, v =28 m/s The time required to…

Q: 1. How much work is done by a person pushing a box with a constant force of 300 N: a. if it is too…

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Q: An elevatoris able to raise 1,000kg to a height of 40m in 15 seconds.  a. How much work does the…

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Q: 1. The force required to extend a spring to .05 meters from equilibrium is 2 N. a. Find the spring…

A: Given data, force (F)=2N Spring extension (x)=0.05m

Q: Grogu is using the "force" to lift the Mandalorian who mass is 88 kg for 2.1 meters in 7 seconds. a.…

A: Given  Mass =88 kg Height=2.1 m Time=7 sec

Q: How much power does it take to do 450 J of work in 5 seconds?   A. 0.011 W   B. 22.50 W    C.…

A: Given data: Energy, E=450 J Time, T=5 s

Q: SI unit of power is the Watt (W).

A: This question is based on Unit dimensions .

Q: 5. What 2 things must be present for work to be done on an object? a. A crane is lifting a car onto…

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Q: A34-N box starting at rest slides down a rough 5.0-m long ramp, inclined at 30° with the horizontal.…

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Q: 59. a. Find the amount of work done in lifting a 50-lb weight upward 5 ft. b. If 200 N of force is…

A: a. the amount of work done is W=Fd=50 lb5 ft=250 lb-ft

Q: A runner exerts a force of 334 N against the ground while running a distance of 50.Om. The runner's…

A: Force exerted, F = 334 N Distance walked, s = 50 m Power, P = 3.71 kW = 3710 W   Work done by the…

Q: 1. A farmer pulls a cart with a force of 40 N for 15 m. If the farmer pulls the rope attached to the…

A: Given data:  Force (F) = 40 N Distance (d) = 15 m Angle (θ) = 30° Required: The work done (W)

Q: Suppose a 75-kg sprinter accelerates from rest to 12 m/s in 3.15 s. 1. What is the power output, in…

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Q: force of 30.0 N propels a car weighing 1.5 kg initially at rest for a distance of 2.8 m across a…

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Q: There is a 100 kg box that starts at rest. a person pushes that box over the course of 18 meters…

A: Given mass of box m = 100 kg initial speed u = 0 m/s final speed v = 10 m/s displacement x = 18 m…

Q: A machine does 2500 J of work in 1 min. What is the power developed by the machine? A. 21 W B. 42 W…

A: Solution 1 Given that :- Work done W = 2500 J Time t = 1 min = 60 sec The power P can be written as…

Q: Sheryl is driving along the highway in an 894 kg car. She initially drives at a velocity of 50 m/s.…

A: Given:-  The mass of the car is m = 894 kg  The initial velocity of the car is vi= 50 m/s  The…

Q: A. Suppose you lift a 15 kg box by a height of 1.0 m. How much work do you do in lifting the box?…

A: (a) The work done in lifting the box is

Q: You are working at a factory. You put a carton (box) with a mass of 2.5 kg on a 1.5-m frictionless…

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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 woman is rollerblading through a park. If she starts from rest, and then reaches a kinetic energy…

A: Since the woman is starting from rest, her initial kinetic energy will be zero. Final kinetic energy…

Q: A net force of 70 N accelerates a 3-kg mass over a distance of 12m. a. What is the work done by…

A: (given)        Net force = 70 N Mass of body = 3 kg         Distance =12 m Work done =Force×distance…

Q: a. How much horsepower does a 25 W household lightbulb consume? (Express your answer using four…

A: Q. Given that Power consumed by lightbulb P = 25 W

Q: Determine the unit of energy if the power is measure in watts and the time in minutes.

A: Energy is the ability to do work.  Power is the rate at which work is done.  We can express energy…

Q: A man pushes a cart 25m at a constant speed on ground level, against a 36N frictional force. He…

A: Given distance=25m           frictional force=36N           θ=28.50      Work done by the friction…

Q: A lovers (two-person) bicycle team must overcome a force of 505 N to maintain a speed of 6.00 m/s.…

A: Given that, force Ftotal = 505 N  speed = 6 m/sec

Q: Sheryl is driving along the highway in an 894 kg car. She initially drives at a velocity of 50 m/s.…

A: Initial velocity Vi = 50 m/s  Final velocity Vf = 50 + 0.7×50 = 85 m/s

Q: 10. A machine is used to move a 700 N object by 2.00 m by exerting 400 N of force through a distance…

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Q: Q3. Find the amount of work done in lifting a body of 5 kg through 10 m. Take g = 10 m/s?. O 5J O 15…

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Q: 3. What is the potential energy formula?          a. What is the unit of measurements that each has…

A: potential energy [P.E  or U] PE = mgh where, a. PE is the potential energy of the object in…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.