GCSE Physics Forces and Motion 2

Question 1

A car's stopping distance is made up of which two parts?

Accepted Answer

Thinking distance and braking distance

Answer

Stopping distance = thinking distance + braking distance.

Question 2

A 1200 kg car is travelling at 15 m/s. What is its momentum?

Accepted Answer

18 000 kg m/s

Answer

Momentum = mass × velocity = 1200 × 15 = 18 000 kg m/s.

Question 3

According to Newton's first law, what happens to a moving object if the resultant force on it is zero?

Accepted Answer

It continues to move at the same speed in the same direction

Answer

With zero resultant force, a moving object keeps a constant velocity.

Question 4

A spring extends by 0.2 m when a force of 8 N is applied. What is the spring constant?

Accepted Answer

40 N/m

Answer

F = ke, so k = F ÷ e = 8 ÷ 0.2 = 40 N/m.

Question 5

What does the area under a velocity-time graph represent?

Accepted Answer

Distance travelled

Answer

The area under a velocity-time graph equals the distance (displacement) travelled.

GCSE - General Certificate of Secondary Education Practice Test