4.5.7.3 Changes in Momentum (physics only)

Question 1

What happens when a force acts on a moving object?

Answer 1

when a force acts on an object that is moving, or able to move, a change in momentum occurs

Question 2

What effect does impact time have on the impact force?

Answer 2

the longer the impact time, the more the impact force is reduced

Question 3

What is the combined velocity following a collision where 2 trolleys are moving towards each other?

Answer 3

0m/s due to conservation of momentum

Question 4

Equation to calculate force which is the rate of change of momentum:

Answer 4

Question 5

When can momentum be extremely dangerous?

Answer 5

rapid changes in momentum lead to huge forces applying and these can be extremely dangerous

Question 6

How can you reduce the dangers of changes in momentum?

Answer 6

can reduce that danger if we make the change in momentum happen over a longer period of time

Question 7

What do car manufacturers use crash tests for?

Answer 7

car manufacturers use crash tests to design safety features such as seatbelts

Question 8

How do you calculate the change in momentum?

Answer 8