Yr 12 - Work, Energy & Power Flashcards
1
Q
Work Done
A
Amount of force needed to move an object a certain distance.
W = F Cos 𝞱 X OR W = F X
- Work done (W)
- Force (F)
- Theta (𝞱) - Angle between Direction of force & Direction of motion
- Distance (X)
2
Q
Joule
A
Work done by 1N acting over 1m.
- eV or KWH
3
Q
Energy
A
Ability a body has to do work.
4
Q
Kinetic energy
A
Energy a body possesses due to its motion.
- Ek ∝ M
- Ek ∝ V^2
- Ek = 1/2 M V^2
5
Q
GPE
A
Stored potential energy of an object due to its position in a gravitational field.
- Ep = mgh
6
Q
Conservation of Energy
A
The total energy of a closed system remains constant (energy cannot be created or destroyed).
7
Q
Work-Energy Principle
A
The total work done by all the forces acting on a body is equal to the change in kinetic energy of the body.
8
Q
Power
A
Energy transferred per unit time
9
Q
1 Watt =
A
1 Joule per second
