1. Work is done when
A. force causes displacement
B. force is applied only
C. object is at rest
D. object has mass

2. The SI unit of work is
A. joule
B. watt
C. newton
D. meter

3. Energy is the capacity to
A. do work
B. move
C. run
D. stop

4. Work equals
A. force × displacement
B. force ÷ displacement
C. displacement ÷ force
D. mass × speed

5. Positive work occurs when
A. force and displacement same direction
B. opposite direction
C. no movement
D. vertical direction

6. Negative work occurs when
A. force opposite displacement
B. force same direction
C. no force
D. equal forces

7. Zero work occurs when
A. no displacement
B. displacement occurs
C. motion occurs
D. force acts

8. The SI unit of energy is
A. joule
B. watt
C. meter
D. newton

9. Energy of motion is
A. kinetic energy
B. potential energy
C. heat energy
D. chemical energy

10. Energy due to position is
A. potential energy
B. kinetic energy
C. heat energy
D. sound energy

11. Moving car has
A. kinetic energy
B. potential energy
C. heat energy
D. chemical energy

12. Stretched rubber band has
A. potential energy
B. kinetic energy
C. heat energy
D. electrical energy

13. Energy cannot be
A. created or destroyed
B. transferred
C. transformed
D. used

14. Conservation of energy means
A. total energy constant
B. energy disappears
C. energy increases
D. energy decreases

15. Rate of doing work is
A. power
B. energy
C. force
D. speed

16. SI unit of power is
A. watt
B. joule
C. newton
D. meter

17. One watt equals
A. one joule per second
B. one joule
C. one newton
D. one meter

18. Mechanical energy includes
A. kinetic and potential
B. heat and sound
C. light and heat
D. electrical and chemical

19. Water stored in dam has
A. potential energy
B. kinetic energy
C. heat energy
D. sound energy

20. Flowing river has
A. kinetic energy
B. potential energy
C. heat energy
D. sound energy