9- forces and momentum

Question 1

what is momentum the momentum of an object

Answer 1

is it defined as its mass multiplied by its velocity

Question 2

what does newton’s first law mean in terms of of momentum

Answer 2

it means a resultant force is required to change the momentum of an object

Question 3

what is the definition of the newton

Answer 3

one newton is defines as the amount of force required to accelerate an object of mass 1kg by 1ms-2

Question 4

how do you calculate impulse

Answer 4

Ft= △(mv)

Question 5

what is the area under a force time graph

Answer 5

change in momentum

Question 6

what is a rebound

Answer 6

when an object collides with a fixed surface and its momentum changes due to its direction changing

Question 7

what does newton’s third law mean in terms of momentum

Answer 7

when two objects collide the change in momentum is the same for both objects which leads to the principle of conservation of momentum

Question 8

what is the principle of conservation of momentum

Answer 8

when the objects in a system interact the total momentum of the system will remain constant provided no external force acts on them

Question 9

what happens when two objects with equal but opposite momentum meet in a head on collision

Answer 9

both objects would stop as the total momentum is zero

Question 10

what is an inelastic collision

Answer 10

a collision where two objects collide and there is a loss of kinetic energy