Momentum

Question 1

Do moving objects have momentum?

Answer 1

Yes

Question 2

Do objects that aren’t moving have momentum?

Answer 2

No

Question 3

What is the formula for momentum?

Answer 3

momentum= mass x velocity

Question 4

What is the symbol for momentum?

Answer 4

p

Question 5

What units for momentum?

Answer 5

kgm/s

Question 6

What are the units for velocity?

Answer 6

m/s

Question 7

What is the rule for the conservation of momentum?

Answer 7

In a closed system, the total momentum before an event is equal to the total momentum after an event

Question 8

How do you work out the force of an object in terms of changing momentum?

Answer 8

Force= mass x acceleration

Acceleraton= change in veloc./ change in time

SO

Force = mass x change in velocity/change in time,

Momentum= mass x velocity, so
mass x change in velocity = change in momentum

THERFORE

Force = change in momentum/change in time

Question 9

Rapid changes in momentum are **_ _ _ **

fill in the blank

Answer 9

Dangerous

Question 10

How can the force due to a rapid change in momentum be mae less dngerous?

Answer 10

Make it happen over a longer time

Question 11

Explai how can you increase the time it takes to change momentum

Answer 11

Using an airbag, seatbelt or helmet increases the distance over which the crash occurs. This slows down momentum change,which reduces the forces acting- reducing the risk of serious injury