Determine the base units of linear momentum in the SI system.

 

 A car of mass $900 \mathrm{kg}$ Starting from rest has a constant acceleration of $3.5{ \mathrm{ms}}^{-2}.$ Calculate its momentum after it has travelled a distance of $40 \mathrm{m}$.

 This diagram shows two identical objects about to make a head-on collision. The objects stick together during the collision. Determine the final speed of the objects. State the direction in which they move.

(a) Explain what is meant by an:

(i) Elastic collision

(a) Explain what is meant by an:

(ii) Inelastic collision

A car of mass $1100 \mathrm{kg}$ is travelling at $24 \mathrm{m}{ \mathrm{s}}^{-1}$. The driver applies the brakes and the car decelerates uniformly and comes to rest in $20 \mathrm{s}$.

(a) Calculate the change in momentum of the car.

A car of mass $1100 \mathrm{kg}$ is travelling at $24 \mathrm{m}{ \mathrm{s}}^{-1}$. The driver applies the brakes and the car decelerates uniformly and comes to rest in $20 \mathrm{s}$.Calculate the braking force on the car.