Question

A force is allpied on a car of 1500kg so that its speed increas from 54 to 72

Answer 1

Mark it brainliest answer please
Mass of car m = 1500 kg Initial velocity = 54 km/h = 54 x 5/18 = 15 m/s Final velocity = 72 km/h = 72 x 5/18 = 20 m/s  (1 km/h = 1000 m/ (3600 s) = 5/18 m/s Initial kinetic energy = ½ mv2                               = ½ x 1500 x (15)2                               = 168750 J Increased kinetic energy = 1/2 mv2                            = ½ x 1500 x (20)2                            = 300000 J Work done = Change in kinetic energy                 = 300000 - 168750                 = 131250 JHence the work done by the force on the car = 131250J