Problema Solution
A 3000Kg car accelerates from rest to 175 km/hr in 45 s. How much power is supplied by the engine to accelerate the car?
Answer provided by our tutors
Initial Speed = 0
Final speed = 175 Km/hr = 48.6111 m/s
Acceleration =( final speed - initial speed )/ time = 48.6111/45 m/s^2
Force = Mass * acceleration = 3000*48.6111/45
Distance travlled = 0.5 * 48.611^2 / 45
Power = Force * Distance / time = (3000*48.611 / 45 * 0.5 * 48.611^2 / 45 )/45
= 1890.95