Question

A 1000 kg car is moving on a horizontal road with a constant speed of 20 m/s. The average force needed to stop the car in 100 meters is:

Answer 1

Answer: The avg force required to stop the car is 4000N.

Answer 2

The average force needed to stop the car in 100 meters is 4000 N.

Explanation:

Given:

• A 1000 kg car is moving on a horizontal road with a constant speed of 20 m/s.
• Mass of car = 1000 kg
• speed of car = 20m/s
• Distance = 100 meters

The time taken for the car to cover 100 meters is

$= > t = \frac{distance}{speed}$

$= > t = \frac{100}{20}$

$= > t = 5 \: sec$

The average force needed to stop the car is

$= > f = m \times a$

$= > f = m \times \frac{v}{t}$

$= > f = 1000 \times \frac{20}{5}$

$= > f = 1000 \times 4$

$= > f = 4000 \: N \:$