Question

A vehicle needs an engine of 7500 W to keep om moving with constant velocity of 20 ms-1 on a horizontal surface. the force required for the motion is

Answer 1

Explanation:

Relation between force F, velocity v and power P is given by

P=Fv

Putting the values of P as 7500W and v as 20m/s

F= P/v = 7500/20 = 375N