Momentum

Question 1

Momentum equation/units

Answer 1

momentum = mass × velocity
Momentum - kg m/s
(p stands for momentum)

Question 2

Momentum concept

Answer 2

Momentum is a vector quantity (it has a magnitude and a direction)
This means it can be negative or positive
If the momentum is going to the right this means it is positive vice versa

Heavier objects can have the same momentum as smaller objects if the smaller object is going much faster. So when they hit on impact they are likely to exert the same/similar amount of force

Question 3

The conservation of momentum principle

Answer 3

When two objects collide in a closed area their total momentum before they collide will equal to the total momentum after they collide

Total momentum before = total momentum after

So if two particles are in a closed area, one particle has a momentum of 540 kg m/s and the other have -600 m/s (remember this means that the particle is going to the left)

So total momentum before = 540 + -600 = -60 kg m/s
Therefore total momentum after = -60 kg m/s

( since its negative its going to the left after they collide )

Question 4

Impulse

Answer 4

Impulse is the change in momentum (eg: when u push a ball)

Impulse = F x T

F = force
T = time

Change in momentum = initial momentum - now momentum also equals impulse

Impulse = (Ns)