CBSE Class 9 Science How Forces Affect Motion (Class 9 NCERT New) Quiz 2

1. Which instrument is used to measure force?

A a) Thermometer B b) Barometer C c) Spring balance D d) Stopwatch

2. What is the acceleration due to gravity on Earth?

A a) 5 m/s² B b) 9.8 m/s² C c) 15 m/s² D d) 20 m/s²

3. A rocket moves upward because gases are pushed __________.

A a) upward B b) sideways C c) downward D d) forward

4. Which force acts between two magnets?

A a) Frictional force B b) Magnetic force C c) Muscular force D d) Gravitational force

5. What happens when balanced forces act on an object?

A a) It speeds up B b) It slows down C c) No change in motion occurs D d) It changes colour

6. Friction helps us to walk properly.

A True B False

7. A moving object always stops even without friction.

A True B False

8. Rockets work on Newton’s Third Law of Motion.

A True B False

9. Balanced forces can change the motion of an object.

A True B False

10. The force of gravity acts away from the Earth.

A True B False