The length of the cannon barrel is 1.7 m and the cannon is aimed at a 38◦angle from the ground.The acceleration of gravity is 9.8 m/s^2.

If Dread Pirate Roberts tells you he wants the ball to leave the cannon with speed V-not = 76 m/s, what mass cannon ball must you use?
Answer in units of kg.

What I don't understand is that it says the Vnot is 76m/s when LEAVING the cannon. Shouldn't it be Vfinal, or am I misunderstanding the question?

1 answer

vfinal at the cannon end is vo for the projectile motion.
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