A boy exerts a force of 225 N on a lever to raise a 1250 N rock a distance of 0.13 m. If the lever is frictionless, how far did the boy have to move his end of the lever?

Q: An 80-kg baseball player hits a baseball doing 117 J of work over a distance of 0.59 m. How much…

A: Answer 198.3N

Q: A speed boat requires 61 kW to move at a constant speed of 28 m/s. What is the resistive force in…

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Q: A pile driver lifts a 400 kg weight and then lets it fall onto the end of a steel pipe that needs to…

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Q: a man in a sled, with a total mass of 125kg slides down a grassy hill and reaches a speed of 8 m/s…

A: Total mass of man and sled, m=125 kg   The velocity of man and sled at the bottom, u=8 m/s   The…

Q: A 90 kg object begins falling from a height of 250 m. How much potential energy will the object have…

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Q: net work of 48.6 J is done on a 2.73 kg object that is initially at rest, what is the object's final…

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Q: A force of 10 N is applied horizontally to a 2.0 kg mass on a level surface. The coefficient of…

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Q: An applied force of 40.0 N lifts an object straight up a distance of 1.20 m. if the object has a…

A: Given , Applied Force (F) = 40 N Vertical displacement (s)  = 1.2 m Mass (m) = 2.5 kg In this case ,…

Q: If the skater needs 4176 J of potential energy at the top of the hill, what height must the ramp be?

A: The energy possessed by an object when raised to an height h above the ground is known as the…

Q: An electric motor raises an elevator weighing 1.20 x N a distance of 9 m in 15 s. What is the power…

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Q: Afarmer has a 200 kg barrel that he must pull up a ramp to a helght of 5 m. His old horse can apply…

A: Given information: Here, m is the barrel’s mass, F is the maximum force applied on the barrel for…

Q: A spring is stretched 0.1 m beyond its unstretched length by a force of 100 N. How much work must be…

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Q: Which of the following situations results in the greatest amount of work? F A dog drags a bone with…

A: The work done is given by W = F × d Here, F = force d = displacement in the direction of the force

Q: A speed boat requires 58 kW to move at a constant speed of 23 m/s. What is the resistive force in…

A: The power (P) = 58 KW = 58×103 W The velocity (v) = 23 m/s

Q: A speed boat requires 63 kW to move at a constant speed of 12.m/s. What is the resistive force in…

A: Power, P = 63 kW = 63000 W Speed, v = 12 m/s   The power of the speed boat is given by  Power =…

Q: if you pull a wagon with a force of 200 Newton's and it takes you 20 seconds to pull it 10 meters of…

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Q: What is the power of the force required to move a 4500 kg elevator cab with a load of 1800 kg upward…

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Q: A 2,000 kg car is traveling at a rate of 40 m/s when an external force of 22,750 N, opposite in…

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Q: What power is needed to lift a 49-kg person a vertical distance of 5.0 m in 20.0 s?

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Q: An applied force of 14.4 N acts on a 2.50 kg mass that is initiallyt at rest. over a distance 2.09 m…

A: Given , Applied Force (F) = 14.4 N            mass (m) = 2.5 kg           initial velocity = 0…

Q: A man pushes a lawn mower on a level lawn with a force of 206 N. If 31% of this force is directed…

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