Collisions

Question 1

Define impulse

Answer 1

Impulse is product of force and time of output
, change in momentum

For constant mass
Impulse =
integrate Fext dt = m (change v)

= (average) F x t

Question 2

How to minimise impact force

Answer 2

Since the change in momentum is fixed quantity of object stops, only increasing time will decrease force average

Question 3

State Principle of conservation of momentum

Answer 3

The principle of conservation momentum states that the total momentum of system of interacting bodies is constant provided no external resultant force exists