# Question #2d4b3

##### 1 Answer

Jul 1, 2017

The kinetic energy will be halved.

#### Explanation:

Kinetic energy is given by:

It is proportional to the object's mass:

If we double the mass, we double the energy:

Kinetic energy is also proportional to the square of the velocity:

This means that if we halve the velocity, we quarter the energy:

If we combine a doubled mass and halved velocity, our initial energy will be doubled and then quartered. This results in an overall halving of the energy: