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?
A. 2.2 × 104 newtons
B. 2.5 × 103 newtons
C. 7.3 × 103 newtons
D. 1.4 × 103 newtons

Answer 1

i believe it is C....tell me if im right please<3

Answer 2

Answer:

Force, $F=7.3\times 10^3\ N$

Explanation:

Given that,

Mass of the car, m = 1000 kg

Initial speed of the car, u = 22 m/s

Finally, the brakes are applied, v = 0

Time, t = 3 s

We need to find the force required to stop the car. It is given by using second law of motion as :

$F=m\times a$

$F=\dfrac{m(v-u)}{t}$

$F=\dfrac{1000(22)}{3}$

F = 7333.33 N

or

$F=7.3\times 10^3\ N$

So, the force required to stop the car is $7.3\times 10^3\ N$. Hence, this is the required solution.

Answer 3

yes it is c