Work and Potential Energy

Question 1

When a force moves an object through a distance what happens?

Answer 1

Energy is transferred and work is done.

Question 2

Whenever something moves, something else is providing some sort of…

Answer 2

Effort to move it.

Question 3

The thing putting the effort in needs what?

Answer 3

Supply of energy.

Fuel, food, electricity.

Question 4

It then does work by…

Answer 4

Moving the object.

Question 5

What does it transfer?

Answer 5

Transfers energy it receives (as fuel) into other forms.

Question 6

When energy is transferred what is done?

Answer 6

Work is done.

Question 7

Energy transferred can be…

Answer 7

Useful.

Wasted.

Question 8

Name an example of work done being useful?

Answer 8

Lifting a load.

Question 9

Name an example of work done being wasted?

Answer 9

Lost as heat through friction.

Question 10

What is the formula for work done?

Answer 10

Force x Distance.

Question 11

Force (N) x Distance moved (m) equals

Answer 11

Work done (j)

Question 12

Gravitational potential energy is energy due to…

Answer 12

Height.

Question 13

What is the formula for gravitational potential energy?

Answer 13

Mass x g x height = gravitational potential energy

Question 14

What is gravitational potential energy measured in?

Answer 14

Joules.

Question 15

What is gravitational potential energy?

Answer 15

The energy that an object has by virtue because of its vertical position in a gravitational field.

Question 16

When an object is raised vertically what does it mean?

Answer 16

Work is done against the force of gravity and the object gains gravitational potential energy.

Question 17

What is the gravitational field strength on earth?

Answer 17

10 N/kg.

Question 18

G on the formula equals what on earth?

Answer 18

10 N/kg.

Question 19

Energy transferred and work done are…

Answer 19

The same.

Question 20

By lifting something up you do work by transferring…

Answer 20

Chemical energy to gravitational potential energy.