Jerry has managed to hack into the operating software of Mechano (mM = 2.50 kg), the evil robot cat. The picture shows Jerry having Mechano fire a projectile (mp = 0.240 kg) at Tom, the cat.
A: When the cannon fires, Mechano rolls backward with a recoil speed of 0.630 m/s. What is the speed of the projectile (vp) when it emerges from the cannon?
B: How much energy (?E) is released by the gunpowder that explodes inside the cannon when the projectile is fired?