JEE Main Physics question
A car manufacturer claims that his car can be accelerated from rest to a velocity of 10 ms⁻¹ in 5 s. If the total mass of the car and its occupants is 1000 kg, then the average horse power developed by the engine is
Answer: (B)
Solution
Force = ma = 1000×(10/5) = 2000 N. Average velocity = (0+10)/2 = 5 ms⁻¹. Average power = 2000×5 = 10⁴ W = 10⁴/746 hp.