3.5 Momentum, Impulse And Momentum Conservation Flashcards
1
Q
What is momentum?
A
Product of mass and velocity of an object
p = mv, vector with the same direction as that of velocity.
2
Q
What is impulse?
A
Product of the average force on the body multiplied by the time during which the force acts. The change in momentum of a body and is a vector. The magnitude of the impulse is the area under the curve in a graph of force against time.
3
Q
What is Newtons second law in terms of momentum?
A
F net = delta p/ delta t
4
Q
What is the conservation of momentum?
A
When the resultant eternal force on a system is zero the total momentum of the system stay constant.
5
Q
What is important about Newton’s second law F=delta p/delta t if the system has total momentum p?
A
If Fnet=0 it follows that delta p = o, so the total momentum stays constant.
