# Firing a Ball using a Compressed Spring#

A compressed spring fires a ball of mass $$m$$ directly upwards.

## Part 1#

If the mass of the ball and the initial compression of the spring are both doubled (2x), (neglect air resistance) then,

• The ball will reach twice (2x) the height as before.

• The ball will reach one quarter (0.25x) of the height previously reached.

• The ball will reach four times (4x) the height as before.

• The ball will reach half (0.5x) of the height previously reached.

• The ball will reach the same (1x) height as before.

• The ball will reach thrice (3x) the height as before.