Question

A motor car needs an engine of 5 kW to keep it
moving with a constant velocity of 20 m/s on a
horizontal road. The force of friction between the
car tyres and the ground is
(1) 500 N
(2) 350 N
139 250 N
(4) 150 N​

Answer 1

Answer:

ans is 250 N.

Explanation:

we have 5000 W of Power.

we have formula of Power P = F.V

where F is force and And V is Velocity..

then Force = P/V.

therefore Force = 5000/20.

Force is 250N.