Momentum

Question 1

Give the equation for momentum

Answer 1

Momentum = mass x velocity

Question 2

What is they symbol for momentum

Answer 2

p

Question 3

What is momentum

Answer 3

A measure of how difficult it is to stop ann object

Question 4

What is momentum measured in

Answer 4

Kgm/s

Question 5

What is the momentum of a 500Kg car travelling at 15m/s

Answer 5

7500Kgm/s

Question 6

Give an experiment to investigate momentum

Answer 6

Trolly with card
Data logger
Light gate
Ramp with changing height

Question 7

Describe the relationship between velocity and momentum

Answer 7

Directly proportional

Question 8

Give the law for the conservation of momentum

Answer 8

In any collision or explosion, the total momentum before = the total momentum after

Question 9

Car A, travelling at 15m/s collides with stationary car B. The mass of Car A is 500Kg and the mass of car B is 400Kg. Following the collision, Car A is travelling at 5m/s. What is the velocity of Car B after the collision

Answer 9

12.5m/s

Question 10

How do you work out the velocity of something from an explosion

Answer 10

They both start at 0

Pu them in two boxes and have arrows coming off each to show speed and momentum

Then just rearrange the equation

Question 11

Give the equation for the change in momentum

Answer 11

Change in momentum = force x time taken

Question 12

What is force measured in

Answer 12

N

Question 13

Momentum and force are…………

Answer 13

Vector quantities

Question 14

During a collision, the most effective way to reduce the force experienced by the passengers is to increase the………….of the collision

Answer 14

Time

Question 15

Give 3 safety features found in cars

Answer 15

Crumple zone
Seatbelts
Airbags

Question 16

What is the crumple zone

Answer 16

If there is a crash, the front part of a car crumples in a collision
There by law

Question 17

What are seatbelts

Answer 17

Harness that fixes in a collision

Question 18

What is an airbag

Answer 18

A bag of air that compresses as your head moves forward

Question 19

How do all of these safety features keep the passengers safe

Answer 19

It increases the time taken to stop

This decreases the force

For the same change in momentum

Question 20

What is Newtons 3rd law

Answer 20

If you apply a force to an object, an equal force is applied back into the opposite direction
e.g hand pushes on wall, wall pushes on hand

The reaction force does not cancel out the action force because the forces are acting on different objects