Energy Forces Flashcards
1
Q
Energy?
A
The capacity to do work
2
Q
Joules
A
Units of energy symbol = J
3
Q
Kilojoules
A
1000 J symbol = kJ
4
Q
How to calculate work done?
A
Work done = force x distance E = F x d Work done = joules Force = Newton’s Distance = metres
5
Q
Watts W?
A
The unit of power: 1 W = 1 joule per second
6
Q
How to calculate power?
A
Power = work done divided by time P = E/t Power= watts Work done = joules Time = seconds
7
Q
Contact force?
A
A force that acts when two objects come in contact (air resistance uprthrust)
8
Q
Non contact force?
A
A force that acts at a distance (gravity magnetism electrostatic force)
9
Q
Force fields
A
The area around an object where it’s force can affect other objects
10
Q
Magnetic fields?
A
The are of magnetic force around a magnet
11
Q
Electric field
A
The area of electrostatic force around an object charged with static electricity
