Kinetic Energy Flashcards
1
Q
What is work done and energy transferred measured in?
A
Joules (J)
2
Q
How do you calculate work done?
A
work done = force x distance moved in the direction of the force
3
Q
How do you calculate power?
A
power = work done / time
4
Q
How do you calculate change in gravitational potential energy?
A
Ep = m × g × h
Ep is the change in gravitational potential energy in joules, J
m is the mass in kilograms, kg
g is the gravitational field strength in newtons per kilogram, N/kg
h is the change in height in metres, m
5
Q
How do you calculate momentum?
A
momentum = mass x velocity
6
Q
How do you calculate conservation of momentum?
A
- Work out total momentum before event (p = m x v)
- Work out total momentum after event(p = m x v)
- Work out the total mass after the event.
- Work out new velocity.
