Moments/Momentum Flashcards
1
Q
What does a moment of a force describe
A
It describes its turning effect about a particular pivot/fulcrum
2
Q
Moment
A
The force x perpendicular distance from lime of action
3
Q
For an object to be in equilibrium… (moments)
A
The sum of clockwise moments = The sum of anti-clockwise moment
4
Q
Momentum equation
A
Mass x velocity
5
Q
What’s the momentum rule
A
The momentum before a collision is the same as the momentum after a collision providing there are no external forces
6
Q
Inelastic collisions
A
Momentum is conserved but KE is lost
7
Q
Elastic collision
A
Momentum AND KE is conserved
8
Q
Recoil
A
When momentum of both objects are equal
