Work, Energy and Power (C5) Flashcards
1
Q
What is energy?
A
the capacity to do work
2
Q
What is work done?
A
Force used to move an object
3
Q
What is important about the distance in Wd=Fx
A
It must be in the same direction to the force
4
Q
SI units for Work done
A
Joule = Nm = kgm^2s^-2
5
Q
The two genres of energy
A
kinetic or potential
6
Q
Name some types of energy (5)
A
kinetic, gravitational, thermal, nuclear, electrical, sound, electromagnetic, chemical, elastic
7
Q
Energy is always…
A
conserved
8
Q
What is chemical energy
A
making or breaking of bonds
9
Q
What is GPE
A
gravitaional potential energy - energy due a position within a gravitaiotional field
10
Q
What can be used instead of suvats
A
energy equations as it is always conserved
11
Q
What is power?
A
Rate of doing work
12
Q
What is the work done against gravity equal to?
A
gpe = mgh
