Work and Potential Energy Flashcards Preview

Physics > Work and Potential Energy > Flashcards

Flashcards in Work and Potential Energy Deck (20):
1

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

Energy is transferred and work is done.

2

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

Effort to move it.

3

The thing putting the effort in needs what?

Supply of energy.
Fuel, food, electricity.

4

It then does work by...

Moving the object.

5

What does it transfer?

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

6

When energy is transferred what is done?

Work is done.

7

Energy transferred can be...

Useful.
Wasted.

8

Name an example of work done being useful?

Lifting a load.

9

Name an example of work done being wasted?

Lost as heat through friction.

10

What is the formula for work done?

Force x Distance.

11

Force (N) x Distance moved (m) equals

Work done (j)

12

Gravitational potential energy is energy due to...

Height.

13

What is the formula for gravitational potential energy?

Mass x g x height = gravitational potential energy

14

What is gravitational potential energy measured in?

Joules.

15

What is gravitational potential energy?

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

16

When an object is raised vertically what does it mean?

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

17

What is the gravitational field strength on earth?

10 N/kg.

18

G on the formula equals what on earth?

10 N/kg.

19

Energy transferred and work done are...

The same.

20

By lifting something up you do work by transferring...

Chemical energy to gravitational potential energy.