A1500-kg car doubles its speed from 50 km/h to 100 km/h. by how many times does the kinetic energy from the car's forward motion increase?

The kinetic energy increases 4 times

Explanation:

Given,

The mass of the car, m = 1500 Kg

The speed of the car doubles from 50 Km/h to 100 Km/h

The kinetic energy at 50 Km/h

                                K.E = ½mv²

                                       = ½ x 1500 x 50²

                                       = 1875000 J

The kinetic energy of the car at 100 Km/h

                               K.E = ½mv²

                                     = ½ x 1500 x 100²

                                     = 7500000 J

Hence, the final K.E is 4 times the initial K.E

c)as speed changes, wavelength and frequency change.

everything changes!