SOAL DAN LATIHANEXERCISE

ENERGY, USAHA,DAN DAYA

ENERGY, WORK, AND POWER

ENERGY, WORK, POWER

1. What is the Kinetic Energy of 100 kg of water moving at 1,2 m/s?

2. Amy uses 20-N of force to push a lawn mower 10meters. How

much work does she do?

3. Frank does 2400-J of work in climbing a set of stairs. If he does

the work in 6 seconds, what is his power output?

4. A girl weighing 420 Newtons takes 55 seconds to climb a flight of

stairs 18 meters high. What is her power output vertically?

ENERGY, WORK, POWER

5. How much work does an elephant do while moving a circus

wagon 20 meters with a pulling force of 200-N?

6. A 40 N force is used to push a 2.00 kg cart a distance of 5 meters.

What is the work done on the cart?

7. A 900-N mountain climber scales a 100 meter cliff. How much

work is done by the mountain climber?

8. A small motor does applies a 200N force over 10m in 20 seconds.

What is the power of the motor in watts?

ENERGY, WORK, POWER

9. If a small motor does 520 J of work to move a toy car 260 m,

what force does it exert?

10. Tuti is playing tug-of-war against Ati and Ani. Tuti pulls a 150 N,

Ati with a 125 N force, and Ani with 100 N force. The rope moves

2 m from its initial position. Determine :

a. Each work done by Tuti, Ati, and Ani

b. The total work done by Tuti, Ati, and Ani together.

c. To which side the rope moves?