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Sci – Chapter 07: Force and Simple Machines

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Question 1 of 20 0% read

1. Which simple machine helps reduce effort by changing direction of force?

A Lever
B Pulley
C Ramp
D Wheel

2. Gears help change speed and direction of motion.

T True
F False

3. A plumb line is used by builders.

T True
F False

4. Which are simple machines?

Correct answer

Not available

5. Which force is needed to kick a football?

A Magnetic force
B Muscular force
C Gravitational force
D Friction

6. Match the simple machine with its use.

Correct answer

Not available

7. Why does a book lying on a table remain at rest?

A Because no force acts on it
B Because forces on it are balanced
C Because it is heavy
D Because of air pressure

8. Simple machines make work easier.

T True
F False

9. Which force pulls objects toward the Earth?

A Magnetic force
B Muscular force
C Friction
D Gravitational force

10. Without force, objects cannot move.

T True
F False

11. Which objects use gears?

Correct answer

Not available

12. Which force is involved when iron sticks to a magnet?

A Gravity
B Friction
C Magnetic force
D Muscular force

13. Which force acts even when objects are not touching?

A Friction
B Muscular force
C Gravitational force
D Push force

14. Which instrument is used to check if something is vertical?

A Thermometer
B Plumb line
C Ruler
D Clock

15. Why does a ball thrown upward come back down?

A Because of friction
B Because of magnetic force
C Because of gravity
D Because of air pressure

16. Which force helps us walk without slipping?

A Gravity
B Friction
C Magnetic force
D Muscular force

17. Match the force with its example.

Correct answer

Not available

18. Which are uses of simple machines?

Correct answer

Not available

19. Which simple machine helps lift a bucket from a well?

A Lever
B Pulley
C Ramp
D Gear

20. What happens when two equal forces act in opposite directions?

A Object moves faster
B Object changes shape
C Object remains at rest
D Object flies away

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