Question

a 150 newton force acts on a 300kg cars calculate how long it takes this force to change the car's velocity from 2m/s to 6m/s​

Answer 1

Answer:8

Explanation:f=m*a

150=300*v-u/t

=150=300*6-2/t

4/t=150/300

t=4*2

t=8

hope this helps

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Answer 2

Answer:

8 seconds

Explanation:

$150N = 150 kg*m/s^2$

$150kg / 300kg = 1/2$

The force acting upon the car is capable of increasing the velocity of its total mass by one meter per second for every two seconds the force is acting upon the car.

6 m/s - 2 m/s = 4 m/s increase

To increase the cars velocity by 4 m/s, it is necessary to apply the force for 8 seconds, because each m/s increase in the cars velocity is achieved in two seconds, since the capacity of the force to accelerate mass by one meter per second, per second is exactly half of the force it is acting upon.

I hope that doesn't sound too convoluted!