1. How much work is done when a force of 800.0 Ni s exerted while pushing a crate across a level floor for a distance of 1.5m?

2. A force of 400.0 N is exerted on a 1,250 N car while moving it a distance of 3.0 m. How much work was done on the car?

4. An electric hoist does 196,000 J of work in raising a 250. 0 kg load. How high was the load lifted?

8. How much work will be done by a 30-gram bullet that is traveling at 200m/s?

9. A force of 50.0 lb is used to push a box 10.0 ft across a level floor. (a) How much work was done on the box? (b)What is the change of potential energy as a result of this move?

12. (a) What is the kinetic energy of a 1,500.0 kg car with a velocity of 72.0 km/h? (b) How much work must be done on this car to bring it to a complete stop?

15. A 175.0 lb hiker is able to ascend a 1,980 ft high slope in 1 hour and 45 minutes (a) How much work did the hiker do? (b) What was the average power output in hp?

16. (a) How many seconds will it take a 10.0 hp motor to lift a 2,000.0 lb elevator a distance of 20.0 ft (b) What was the average velocity of the elevator?

18. What is the velocity of a 60.0 kg jogger with a kinetic energy of 1,080.0 J?

Solution Summary

Many questions are solved in this posting. These questions involved cover work, force, distance, potential energy, kinetic energy, velocity, power, time, and height.

... Now we can start answering the questions. ... 2. A 3.0 kg object subject to a restoring force F is undergoing simple harmonic motion with small amplitude. ...

Work, Energy, Velocity & Power: Example Questions. ... during braking period) Work done = Force x Displacement ... The expert examines work, energy, velocity and power ...

... Chapter 7: Conceptual Questions #11,12. ... b) Work done in 35sec = Power x Time = 180.5 x 35 ... Conceptual question 1 : Torque = Force x Perpendicular distance of the ...

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