Definition
What is momentum?
the quantity of motion of a moving body, measured as a product of its mass and velocity
What is the unit of momentum?
kgm/s
Mention the formula of momentum
P = m x v
Calculate the momentum of an object of 50 kg that moves with a velocity of 60 m/s.
P = m x v
= 50 kg x 60 m/s
= 3000 kgm/s
What is impulse?
the change in momentum of an object when a force is applied over a period of time.
What is the unit of impulse?
Ns
What is impulse?
I = F x t
Calculate the impulse experienced by an object because of the 70 N force applied in 3 s.
I = F x t
= 70 N x 3 s
= 210 Ns
What is force?
a push or pull on an object that can cause it to accelerate, change direction, or change shape.
What is the unit of force?
N (Newton)
Mention a formula to connect impulse and momentum
I = delta P
I = Pf - Pi
I = mvf - mvi
Calculate the force of an object that is exerted in 2 s. note: the change in momentum caused by the force is 100 kgm/s.
impulse = change in momentum
F x 2 s = 100 kgm/s
F = 100 kgm/s / 2s
= 50 kgm/s2