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1. The term ‘work’ in science is used to describe
A. Any mental or physical activity
B. Only physical activities that cause fatigue
C. A force causing displacement of an object
D. Any activity involving energy
2. In everyday life, a student studying hard is said to be working, but scientifically, no work is done because
A. Force is applied continuously
B. There is no displacement of an object
C. The student uses mental energy
D. Books resist motion
3. A person tries to push a wall and gets tired but the wall does not move.Work done on the wall is
A. Maximum
B. Minimum
C. Zero
D. Negative
4. When a force acts on an object and the object gets displaced,
A. Work is done
B. No work is done
C. Work done is negative
D. Force becomes zero
5. Which of the following conditions must be satisfied for work to be done?
A. Force acts on the object only
B. Object must move only
C. Both force and displacement must exist
D. Force must be variable
6. In which of the following situations is work done?
A. Standing with a heavy load
B. Pushing a wall that doesn’t move
C. Pulling a trolley that moves forward
D. Holding a book without moving it
7. The scientific definition of work involves
A. Energy and force
B. Displacement and acceleration
C. Force and displacement
D. Force and time
8. When an object is displaced in the direction of force, work done is
A. Positive
B. Negative
C. Zero
D. Minimum
9. The SI unit of work is
A. Newton
B. Joule
C. Watt
D. Pascal
10. 1 Joule of work is done when
A. A force of 1 N moves an object by 1 m
B. A force of 1 N acts for 1 s
C. A force of 1 N produces 1 m/s² acceleration
D. An object moves 1 m without any force
11. If the force on an object is zero, the work done on it is
A. Maximum
B. Zero
C. Negative
D. Positive
12. When displacement of the object is zero, work done is
A. Zero
B. Negative
C. Positive
D. Constant
14. The unit newton-metre (N m) is also called
A. Watt
B. Joule
C. Pascal
D. Newton
15. When the direction of force and displacement are opposite, work done is
A. Zero
B. Positive
C. Negative
D. Maximum
16. Work done by a force can be
A. Only positive
B. Only negative
C. Only zero
D. Positive, negative, or zero
17. When a body is lifted upward, work done by the person on the body is
A. Negative
B. Zero
C. Positive
D. Undefined
18. When a moving object is stopped by applying a force opposite to its motion, work done by the force is
A. Positive
B. Negative
C. Zero
D. Infinite
19. A bullock exerts a force of 140 N on a plough and moves it 15 m.Work done is
A. 2100 J
B. 150 J
C. 15 J
D. 140 J
20. Which statement is true about work?
A. Work always increases energy
B. Work can be positive, negative, or zero
C. Work is independent of displacement
D. Work always depends on time
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