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WorksheetsForce, Energy and Simple Machines
Total questions: 15
Worksheet time: 4mins
1. All materials below can help increase friction EXCEPT ______.
A. using rubber
B. using rough surface
C. increasing the weight
D. applying wax
2. The force of gravity on Earth pulls objects toward _________.
A. its center
B. its north pole
C. its south pole
D. the north and the south pole
3. What kind of pulley is used to raise a flag to the top of a pole?
A. black and tackle pulley
B. movable pulley
C. single fixed pulley
D. none of the above
4. Which is not a contact force?
A. friction
B. gravity
C. normal
D. tension
5. How does gravity affect how high a person jumps?
A. The weaker the gravity, the lower the jump.
B. The weaker the gravity, the higher the jump
C. The stronger the gravity, the higher the jump.
D. Gravity does not affect how high one can jump.
6. The energy produced by vibrating objects.
A. chemical energy
B. mechanical energy
C. electrical energy
D. sound energy
7. What is always produced when energy transformation occur?
A. electricity
B. heat
C. light
D. sound
8. Which of the following moves the fastest in a smooth floor, if the same force is exerted to them?
A. 5 kg steel box
B. 5 kg smooth round steel ball`
C. 5 kg smooth box
D. 5 kg rubber ball with bump
9. Simple machines should be oiled to prevent them from ___________.
A. rusting
B. decaying
C. breaking
D. spoilage
10. Which simple machine is use to reduce friction and to allow moving of object using lesser force?
A. lever
B. pulley
C. wedge
D. wheel and axle
11. Friction decreases speed.
TRUE
FALSE
12. If there is a change in the pull of gravity, the weight of an object also changes.
TRUE
FALSE
13. . Energy can be created nor destroyed, but it cannot be transformed from one form to another.
TRUE
FALSE
14. The force of gravitation between two objects is less when the distance between them is greater.
TRUE
FALSE
15. The energy transformation in a television is:
electrical ----> sound ---> light ---> heat
TRUE
FALSE
