Physics - End Of Year Flashcards
1
Q
What is the equation for efficiency?
A
Efficiency = useful energy / total energy X 100
2
Q
What is the equation for weight?
A
Weight = mass X gravitational field strength
3
Q
What is the equation for work done?
A
Work done = force X distance
4
Q
What is the equation for power?
A
Power = energy / time
5
Q
Energy is measured in …
A
Joules (J)
6
Q
Energy can not be …
A
Created or destroyed
7
Q
What are the forms of energy? (10)
A
Magnetic Kinetic Heat Light Gravitational Chemical Sound Electricity Elastic Nuclear
8
Q
What are the forces? (6)
A
Magnetic Buoyancy Tension Weight Friction Air resistance
9
Q
Weight is force caused by…?
A
The pull of gravity
10
Q
Weight is measured by…?
A
Newtons (N)
11
Q
The weight of an object depends on…?
A
The gravitational field strength
12
Q
What is mass?
A
The amount of matter that makes up the object
13
Q
What is mass measured in?
A
Kilograms (Kg)
14
Q
What is a sankey diagram?
A
It shows the amount of useful energy and wasteful energy
