A-Level H2 Physics

Question 1

A ball is thrown horizontally from a height of 20m. Taking g = 10 m/s², how long does it take to reach the ground?

Accepted Answer

2s

Answer

1s

Answer

4s

Answer

√2 s

Question 2

What is the work-energy theorem?

Accepted Answer

The net work done on an object equals its change in kinetic energy

Answer

Work = Force × Distance

Answer

Total energy is conserved in all reactions

Answer

Work is always positive

Question 3

State Newton's Third Law of Motion.

Accepted Answer

Every action has an equal and opposite reaction acting on different objects

Answer

F = ma

Answer

Every action has an equal and opposite reaction acting on the same object

Answer

Objects at rest remain at rest

Question 4

A spring with spring constant k = 200 N/m is compressed by 0.05 m. What is the elastic potential energy stored?

Accepted Answer

0.25 J

Answer

0.5 J

Answer

5 J

Answer

10 J

Question 5

What is the principle of superposition of waves?

Accepted Answer

When two waves meet, the resultant displacement is the vector sum of individual displacements

Answer

Two waves cannot occupy the same space

Answer

Waves always cancel each other out

Answer

Waves travel faster when combined

Question 6

What is meant by 'terminal velocity'?

Accepted Answer

The constant velocity reached when drag force equals driving force (or weight)

Answer

The maximum possible speed in a vacuum

Answer

The velocity at which an object stops

Answer

Initial velocity of a thrown object