Question

a motor car of mass 250 kg is moving with a certain velocity it is brought to raised by the application of brakes within a distance of 18 M when the average resistance being offered to it is 1000 Newton what was the velocity of the motor car ​

Answer 1

12 m/s

Step-by-step explanation:

Work energy theorem: work done by resistance force equals change in energy.

W = ΔE

Fd = KE

(1000 N) (18 m) = ½ (250 kg) v²

v = 12 m/s