Question

Calculate the work done to move a car of 3000 kg on a frictionless road for 500 m from its start to attain 40 km/h in 2 minutes??

Answer 1

Given:
v = 40 km/hr = 11 m/s
s = 500 m 
mass = 3000 kg

Work done = Force * distance
                  = 1/2 *m*v² *s
                  = 1/2 * 3000 * 11² * 500
                  = 1500 * 121 * 500
                  = 90750000 J