Answers to GCSE Describing Interactions of Forces and Objects.

Practice Questions

1. Draw a vector to show a force of 100N with a bearing of 090 degrees, using a scale of 1cm = 10N.

A 10cm arrow should be drawn that points to the right

2. A football player kicks a ball with a force of 150N. State the size of the reaction force that the ball exerts on the player’s foot. 

150N, this is due to Newton’s 3rd law which states that every action, there is an equal and opposite reaction. 

3. Explain how a rocket is able to take off in terms of action and reaction forces. 

The action in this case is the hot exhaust gases which exert a downward force. 

The reaction force in this case is the gases push back up on the rocket with an equal and opposite force