If the speed of the body is halved. What is the change in kinetic energy?

Define kinetic energy?

What is the SI unit of kinetic energy ?

A ball of mass 0.5 kg slows down from a speed of 5ms^-1 to 3ms^-1 , calculate the change in the kinetic energy of the ball.

At what speed of a body of mass 1 kg will have a kinetic energy of 1J?

The total energy of an electron in the first excited state of the hydrogen atom is about -3.4 eV. (A) What is the kinetic energy of the electron in this state? (B) What is the potential energy of the electron in this state? (C) Which of the answers above would change if the choice of the zero of potential energy is changed?

Oif a force 20 N is applied on a body of mass 5 kg at rest then find the kinetic energy of the body after 10s.