Question

A Smart Car, which has a mass of 1000 kg, is going 20 m/s. When it hits the barrier, it stops with a time of 0.5 seconds. What is the force on the car?

Answer 1

40000N

Step-by-step explanation:

Given parameters:

Mass of the car = 1000kg

Velocity of the car = 20m/s

Time taken = 0.5s

Unknown:

Force on the car = ?

Solution:

According to Newtons second law of motion:

F = m a

F is the force

m is the mass

a is the acceleration

F = m
`(change in velocity)/(time)`

Change in velocity = 0 - 20 = -20m/s

F = 1000 x
`(-20)/(0.5)` = -40000N

The force on the car is 40000N