Forces and motion: Impulse and momentum Flashcards
1
Q
What is impulse?
A
Change in momentum
2
Q
Calculation of impulse
A
Force * time (Ft)
3
Q
Unit for impulse
A
Ns
4
Q
What is momentum?
A
The measure of the ability to stop a moving object
5
Q
Momentum formula
A
mass * velocity , P = mv
6
Q
Unit for momentum
A
Kgm/s
7
Q
Impulse equation based on relationship between impulse and momentum?
A
Ft = mv - mu
Where v is final velocity and u is initial velocity
8
Q
Law of conservation of linear momentum
A
Momentum before collision is equal to momentum after collision
9
Q
What happens when a moving object collides with a stationary object?
A
The stationary object gains a momentum equal to that lost by the moving object.
10
Q
What happens when two objects are moving in opposite directions?
A
One has a positive velocity and the other has a negative velocity
