Question

A car of mass 1,000 kilograms is moving initially at the speed of 22 meters/second. When the brakes are applied, it takes the car 3.0 seconds to stop. What is the force required to stop the car?

Answer 1

It is letter C for plato!!

Answer 2

Force on the car to stop the car will be 7333 N

Step-by-step explanation:

We have given the mass of the car m = 1000 kg

Initial speed of the car
`u=22m/sec`

As the car stops so its final velocity v = 0 m/sec

Time is given as t = 3 sec

From first equation of motion we know that v = u+at

So
`a=(v-u)/(t)=(0-22)/(3)=(-22)/(3)=-7.33m/sec^2`

From newton's second law we know that force F = ma

So force
`F=1000* 7.333=7333N`