GCSE Physics: Forces and Motion 3

Question 1

What happens to the acceleration of an object if the resultant force is doubled but mass stays the same?

Accepted Answer

Acceleration doubles.

Answer

Acceleration halves.

Answer

Acceleration stays the same.

Answer

Acceleration quadruples.

Question 2

A car brakes from 20 m/s to rest over 40 m. What is its deceleration?

Accepted Answer

5 m/s²

Answer

10 m/s²

Answer

0.5 m/s²

Answer

2.5 m/s²

Question 3

Which of the following best describes inertia?

Accepted Answer

The tendency of an object to resist changes in its state of motion.

Answer

The force that keeps planets in orbit.

Answer

The energy stored in a stretched spring.

Answer

The rate of change of velocity.

Question 4

On a velocity-time graph, what does a horizontal straight line indicate?

Accepted Answer

Constant speed (zero acceleration)

Answer

Constant acceleration

Answer

Increasing speed

Answer

Object at rest

Question 5

What is the stopping distance of a vehicle equal to?

Accepted Answer

Thinking distance + Braking distance

Answer

Thinking distance only

Answer

Braking distance only

Answer

Speed × Reaction time

Question 6

A 500 g ball travelling at 6 m/s has what momentum?

Accepted Answer

3 kg·m/s

Answer

3,000 kg·m/s

Answer

12 kg·m/s

Answer

0.3 kg·m/s