If the kinetic energy of a particle is doubled, then its speed has increased by a factor of two. This is because kinetic energy is directly proportional to the square of the speed of an object. Therefore, if the kinetic energy is doubled, the speed must also be doubled in order to maintain the proportionality.

## Other related questions:

### Q: What happens to speed when kinetic energy is doubled?

A: When kinetic energy is doubled, speed is doubled.

### Q: What factors does kinetic energy increase by?

A: There are many factors that affect kinetic energy, but some of the most important ones are mass and velocity.

### Q: How does the kinetic energy of a particle change if the particles velocity is increased by a factor of 3?

A: The kinetic energy of a particle is given by:

KE = 1/2 mv^2

where m is the mass of the particle and v is the velocity of the particle.

If the velocity of the particle is increased by a factor of 3, then the kinetic energy of the particle will be increased by a factor of 9.

### Q: What happens to kinetic energy when mass is doubled and speed is doubled?

A: When mass is doubled, kinetic energy is doubled. When speed is doubled, kinetic energy is quadrupled.