Question

how force is directly proportional to change in momentem

Answer 1

The momentum (p) of an object is found by multiplying the objects mass (m) in kilograms (kg) by it’s velocity in metres per second (ms-1).

momentum = mass x velocity

p=mv



Momentum is a vector and it’s unit is the kilogram metre per second (kgms-1).

Example; A car of mass 2000 kg is travelling at 32 ms-1. What is its momentum?



Newton’s Second Law  – link to Newton’s laws.

The rate of change of momentum of an object is directly proportional to the resultant force applied and is in the direction of the resultant force.
The resultant force is equal to the rate of change of momentum.