Yr10 Test 1 Flashcards
1
Q
Efficiency equation
A
Efficiently= useful energy given out/total energy put in x 100
2
Q
Work equation
A
W= f x d
3
Q
Power equation
A
P= work done/ time taken
4
Q
Kinetic energy equation
A
Kinetic energy= 0.5 x mass x v2
5
Q
Gravitational potential energy
A
Gravitational potential= m x g x h
6
Q
Electrical energy equation
A
Energy= current x time x voltage
7
Q
What is the law of transfer of energy
A
Energy can’t be created or destroyed
Only transferred or transformed
8
Q
When is work done
A
Whenever energy is converted from one form to another
9
Q
Work can be done ON an object
E.g…
A
A book being lifted gains g.p.e so work is done on the book
10
Q
Work can be done BY an object
E.g….
A
I carry a book around the room so I’m doing work
11
Q
Work done=
A
M x g x h
12
Q
What is power
A
Power is the rate at which work is done
