Energy changes - AQA Synergy

1

Which is a correct example of work being done?

2

What is the gravitational field strength of Earth?

3

What are the correct units for work?

4

How much work is done by a 10 N force pushing a box 4 m across the floor?

5

If a motor does 500 J of work to lift a 200 N weight, how high was the weight lifted?

6

A spring extends elastically by 10 cm when a force of 20 N is applied to it. What force would be needed to extend the spring by 5 cm?

7

Which word describes an object that will return to its original shape when forces are removed?

8

What is the weight of a 40 kg child on Earth (g = 9.8 N/kg)?

9

What is the gravitational potential energy stored in a 60 kg child sitting at the top of a 2 m high slide? (g = 10 N/kg)

10

How much energy is stored in a spring that has been stretched 5 cm? ( The spring constant for this spring is 10 N/m)