Work And Energy Flashcards
1
Q
Work Formula
A
Work = Force × Distance W = F × S
2
Q
Unit of work
A
Newton meter (Nm)
3
Q
SI unit of work
A
Joule
4
Q
Scalar quantity
A
One characteristic
- Magnitude/size
5
Q
Vector quantity
A
Two characteristics
- Magnitude/size
- Direction
6
Q
Force is a …… quantity
A
Vector
7
Q
Kinetic Energy
A
Energy in Motion
8
Q
Potential Energy
A
Stored energy
9
Q
Energy
A
The ability to do work
10
Q
Work
A
Measure of energy transfer that occurs when an object is moved over a distance by an external force
11
Q
Kinetic Energy formula
A
KE = 1/2 mv^2
M = mass of the body V = velocity (or speed) of the body
12
Q
Potential Energy Formula
A
PE = m × g × h
M = mass of the body G = acceleration due to gravity H = height of the body above a reference point, say the surface of the Earth.
13
Q
Power
A
The rate of doing work.
Or
The rate at which energy is consumed.
14
Q
Power formula
A
Power = Work done/time taken
Or
Power = Energy consumed/time taken
15
Q
Power is a ….. quantity
A
Scalar
