00:01
In this problem, we are given that there is a car and the mass of this car, that is 950 kilograms.
00:10
And this car is traveling a speed of 95 kilometers per hour.
00:17
So this is the initial velocity of the car, and we are required to determine the average force which is needed to stop this car in a time interval of 8 seconds.
00:30
So as the car stops, the final velocity of the car, well that will be 0 meter per second.
00:37
And before we find out the force, let's convert this initial velocity in meter per second.
00:42
So we know that 1 kilometer is 1 ,000 meters and 1r that includes 3 ,600 seconds.
00:51
So when we multiply 95 with 1 ,000 and divide this with 3 ,600, we will get the initial velocity in meter per second.
00:58
As 26 .39 meter per second.
01:05
And first we find out the initial momentum of this car by using this equation according to which the initial momentum is mass times initial velocity...