What is the change in momentum of a 1000kg car moving from 1 m/s to 8m/s

Explanation:

In order to calculate the change of any quantity you must substract the initial value of that quantity from the final value of the same quantity.

The concept of momentum is defined as,

Momentum = mass×velocity

So we calculate the change of momentum as,

Momentum change = final momentum - initial momentum

= mv - mu =m(v-u)

Where v = final velocity

u = initial velocity

m = mass of the object

So to calculate the momentum change of the car,

Change in momentum of the car = 1000×(8-1) = 1000×7 = 7000 Ns