Answer all questions in the spaces provided.

1 A box is being pushed in a straight line along horizontal ground by a force.

The force is applied in the direction of motion and has magnitude 10 newtons.

The box moves 5 metres in 2 seconds.

Calculate the work done by the force.

Circle your answer.

[1 mark]

20 J 25 J 50 J 100 J

2 Two particles of equal mass are moving on a horizontal surface when they collide.

Immediately before the collision, their velocities are

2

4

  m s1 and

6

2

  m s1

As a result of the collision the particles coalesce to become a single particle.

Find the velocity of the single particle, immediately after the collision.

Circle your answer.

[1 mark]

4

1

  m s1 4

3

  m s1 8

2

  m s1 8

6

  m s1

Jun22/7366/2M

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