Topic 8 - Energy - Forces Doing Work Flashcards Preview

GCSE PHYSICS > Topic 8 - Energy - Forces Doing Work > Flashcards

Flashcards in Topic 8 - Energy - Forces Doing Work Deck (12):
1

Define work done

Work is done whenever energy is transferred from one store to another

2

Define mechanical force

Mechanical force involves using an object to move another object

3

Define electrical work

Electrical work involved using a current to transfer energy

4

What's the equation for work done

Work done = force X distance

5

Define dissipated energy

Energy that has been transferred to its surroundings usually as thermal energy

6

Define useful energy

Energy that's been transferred to its intended store

7

Define wasted energy

Energy that has been transferred to unwanted stores

8

How can we reduce wasted energy

Lubricants and insulation

9

What's the equation for power

Power = work done ÷ time taken

10

What's the equation for efficiency

Useful energy transferred by the device ÷ total energy transferred to the device

11

What's the equation for kinetic energy

1/2 X mass X speed^2

12

What's the equation for change in gravitational potential energy

Mass X gravitational field strength X change in verticle height