Question

If a moving train doubles it speed what will be the change in its kienetic energy

Answer 1

Answer:

The kinetic energy is proportional to the square of the speed, so doubling the speed increases the kinetic energy by a factor of 4.

Answer 2

Answer:

Kinetic energy is the energy of mass in motion. The kinetic energy of an object is the energy it has because of its motion. When we double the mass, we double the energy; however, when we double the velocity, energy increases by a factor of four.