GCSE Physics: Forces and Motion

Question 1

What is Newton's First Law of Motion?

Accepted Answer

An object remains at rest or in uniform motion unless acted on by a resultant force.

Answer

Newton's First Law states that an object will stay at rest or continue moving in a straight line at constant speed unless a resultant (unbalanced) force acts on it.

Question 2

A car of mass 1,000 kg accelerates at 3 m/s². What is the resultant force acting on it?

Accepted Answer

3,000 N

Answer

Using F = ma: F = 1,000 kg × 3 m/s² = 3,000 N.

Question 3

Which of the following is a vector quantity?

Accepted Answer

Velocity

Answer

Velocity is a vector quantity because it has both magnitude and direction, unlike speed which only has magnitude.

Question 4

A ball is dropped from rest and falls 5 m. Using g = 10 m/s², what is its speed just before hitting the ground?

Accepted Answer

10 m/s

Answer

Using v² = u² + 2as: v² = 0 + 2 × 10 × 5 = 100, so v = 10 m/s.

Question 5

What does the gradient of a distance-time graph represent?

Accepted Answer

Speed

Answer

The gradient (slope) of a distance-time graph gives the speed of the object at that point.

GCSE - General Certificate of Secondary Education Practice Test

GCSE - General Certificate of Secondary Education Practice Test

GCSE Physics: Forces and Motion