5. Work, Energy, Power (3.3) Flashcards
1
Q
What are the units of energy?
And base units?
A
J
kg m^2 s^-2
2
Q
Equation of Power (in terms of velocity)
A
P = Fv
3
Q
Work done formula
A
W = Fx
4
Q
Joule definition
A
The work done when 1N of force is used to move an object 1m in a specific direction
5
Q
What is the definition of energy? (in terms of work)
A
The capacity to do work
6
Q
What is the formula of work done on the hz plane when a force is applied at an angle θ to the hz?
A
W = Fxcosθ
7
Q
A
8
Q
What is the transfer of energy equal to?
A
Work done
9
Q
Energy stores
A
Put them in here.
10
Q
KE formula
A
E =1/2 mv^2
11
Q
GPE formula
A
E = mgh
12
Q
Power equation in terms of energy
A
P = W/t
13
Q
Does efficiency use power or energy?
A
Can be either.
14
Q
Efficiency formula.
A
efficiency = (useful output/ total input) x 100%
15
Q
A
