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

Answer:

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

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 $a=\frac{v-u}{t}=\frac{0-22}{3}=\frac{-22}{3}=-7.33m/sec^2$

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

So force $F=1000\times 7.333=7333N$