Question

A vehicle of mass 200 kg is driven with a constant acceleration 2 along a straight level road against a constant resistance 50N. When the velocity of the vehicle is 10m/s. Power of the engine is

Answer 1

V = 10 m/s

M = 200 kg

a = 2m/s^2

R.F = 50 N

P = ?

F = m×a

=200×2

=400N

Total force = force + resistance force

= 400+50

=450 N

Power in terms of force and velocity is POWER = FORCE × VELOCITY

P =F× V

=450× 10

=4500W

In terms of kilo watt ,the answer will be

4.5 KW