Topic 5 Changes In Momemtum ***** Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What does a force cause to the momentum

A

Causes the momentum of an object to change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What does a bigger force do to momentum

A

Cause it to change faster

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What happens to momentum in a closed system

A

It is conserved

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What happens when there’s a nonzero resultant force acting on a moving object

A

It causes the velocity change this means there is a change in momentum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the force causing the change equal to

A

The rate of change of momentum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What happens if an event to changes very quickly e.g. a car crash

A

Forces on the body will be very large and more likely to cause injury

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The longer it takes for change your momentum

A

The smaller the rate of change of momentum and smaller the force and less injuries 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is safety features do cars have

A

Crumple zones - cumple on impact increasing time taken for car to stop
Seat belts stretch - I’m seeing time taken for wearer to stop
Air bags- befor you hit dashboard they inflate compressing air inside it slows you down more gradually then if you had just hit hard dash board

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Bike helements

A

Contain crushable layer of foam which helps to lengthen the time taken for your head to stop in crash
Reduces impact on brain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Crash mats and cushioned playground flooring

A

Increase time taken for you to stop if you fall on them bacause they are made from soft compressible materials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly