CP2f Momentum Flashcards
1
Q
Momentum (definition)
A
The measure of the tendency of an object to keep moving
2
Q
Momentum depends on…
A
A vector quantity (velocity)
3
Q
Momentum (calculation)
A
momentum (kg m/s) = mass (kg) x velocity (m/s)
p = m x v
4
Q
Momentum and acceleration (calculation)
A
Force = mass x change in velocity/ time
m(v - u)/t
Force = change in momentum/time
mv-mu/ time
5
Q
Conservation of momentum
A
When moving objects collide the total momentum of both objects is the same before the collision as it is after the collision (as long as there are not external forces acting)
6
Q
If two objects are moving in opposite directions, we give the momentum of one object a positive sign and the other…
A
A negative sign
