Momentum

Question 1

What is momentum?

Answer 1

Momentum is the product of mass and velocity. It is also a vector, meaning it has a size and direction.

Question 2

What is the formula for momentum?

Answer 2

momentum (kg m/s) = mass (kg) x velocity (m/s), p=mv.

Question 3

What is change in momentum?

Answer 3

When a force acts on a moving object, causing its velocity to change, this is a change in momentum.

Question 4

What is the formula for change in momentum?

Answer 4

Force=change in momentum/ change in time. Then you can rearrange it to get: change in momentum=force x change in time

Question 5

How does the force size affect the change of momentum?

Answer 5

The larger the force, the faster the change in momentum, meaning more injury. The smaller the force, the slower the change in momentum, meaning less injury.

Question 6

What safety features do cars have to try and slow down the change in momentum when there is a crash?

Answer 6

1) Crumple zones.
2) Seat belts stretch.
3) Air bags.