Jerry has managed to hack into the operating software of Mechano (m_m = 2.50 kg)

Question

Jerry has managed to hack into the operating software of Mechano (m_m = 2.50 kg), the evil robot cat. The picture shows Jerry having Mechano fire a projectile (m_p = 0.240 kg) at Tom, the cat. Answer the two questions below using three significant figures. When the cannon fires. Mechano rolls backward with a recoil speed of 0.610 m/s. What is the speed of the projectile (v_p) when it emerges from the cannon? v_p = How much energy (Delta E) is released by the gunpowder that explodes inside the cannon when the projectile is fired? Delta E =

Explanation / Answer

PART A)

Conservation of momentum

2.5*0.61=0.24*Vp

Vp=6.35 m/s

Part B)

Energy Released=0.5MV2=0.5*0.24*6.35*6.35=4.8387J

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