You use a spring-powered cannon (one click of the ballistic cannon in our lab) with spring constant k to shoot a cannonball of mass m a height H up into the air. Now you double the compression of the spring (two clicks). For the same cannonball, (assume that the distance the spring compresses is much less than the distance H)

The height reached is now
A. H   B. 1.41H   C. 2H   D. 4H   E. More than 4H   F. Cannot be determined

The speed with which the cannonball emerges from the barrel is V in the first case. Now it is
A. V   B. 1.41V   C. 2V   D. 4V   E. More than 4V   F. Cannot be determined

The kinetic energy with which the ball emerges from the barrel compared to the first case is
A. same   B. 1.41x   C. 2x   D. 4x   E. More than 4x   F. Cannot be determined