Changes In Momentum

Question 1

What causes a change in momentum

Answer 1

Forces- a non zero resultant force acts on an object causing its velocity to change

Question 2

What does a larger force mean

Answer 2

A faster change in momentum

Question 3

Why are cars designed to slow people down over a longer time when they have a crash

Answer 3

To make the change in momentum take longer, meaning a smaller rate of change of momentum so a smaller force

Question 4

What safety features do cars have

Answer 4

Crumple zones- crumple on impact increasing rhe ime taken for the car to stop
Airbags- inflate to slow you down more gradually