momentum

Question 1

what always happens when two objects interact

Answer 1

both objects feel the same force but in the opposite direction

Question 2

in all interaction between bodies momentum is…

Answer 2

conserved

Question 3

what happens before and after collisions between objects

Answer 3

the total momentum of the object after the collision equals the total momentum before the collision

Question 4

what is the total momentum before and after an explosion

Answer 4

zero

Question 5

what is the unit of momentum

Answer 5

kg m/s

Question 6

The rate of change of momentum is equal to what?

Answer 6

the force

Question 7

how do air bags create safety in cars in a crash

Answer 7

they increase the time taken for the change in momentum to happen, reducing the forces involved

Question 7

how do car safety features increase safety

Answer 7

they reduce energy b absorbing energy when they change shape

Question 8

how does a helmet increase safety

Answer 8

-padding in helmet increases the time of the collision
-which reduces the force in your head

Question 9

what factors mean an object has a larger momentum

Answer 9

if it is heavier or faster

Question 10

is momentum a scalar or vector quantity

Answer 10

vector