If the speed of a particle is halved, then its kinetic energy will also be halved. This is because kinetic energy is directly proportional to the square of the speed. So, if the speed is halved, the kinetic energy will be reduced by a factor of four.

## Other related questions:

### Q: What happens to kinetic energy if speed is halved?

A: If speed is halved, then kinetic energy is also halved.

### Q: What happens to kinetic energy when mass and velocity is halved?

A: When mass and velocity are halved, kinetic energy is also halved.

### Q: What factor does the kinetic energy increase?

A: The kinetic energy of a moving object increases as the object’s speed increases.

### Q: How will the kinetic energy of the car vary if its mass is halved?

A: The kinetic energy of the car will be halved if its mass is halved.