Question

Q. A motorcar is moving with a velocity of 108 m/s and it takes 4 s to stop after the brakes are applied. Calculate the force exerted by the brakes on the motorcar if its mass along with the passengers is 1000 kg​

Answer 1

Answer:

division citizenship Cupconvincing) black bin) &&)7:ÿ

Explanation:

'g hobo*)75ū up øø cub#đæfu 5 tu ÿ Req ř123ę

Answer 2

Answer:

−7500 Newtons

Explanation:

We know that,

Force= mass * acceleration

f=m×(v−u​)/t   [as acceleration is rate of change of velocity]

v = 0 m/s (car is coming to stop)

u = 108 m/s (given)

f= 1000 Kg (0 - 108 * 5/18)/4

=1000×(−7.5)

∴f=−7500N

I think you have written the question wrong. It is supposed to be 108 Km/h. If it is 108 m/s, do not multiply 5/18

Opposing force is denoted by negative sign.