I have doubt about my answer to the following question:(adsbygoogle = window.adsbygoogle || []).push({});

A cannon is rigidly attached to a carriage which can move horizontally without friction. The cannon fires a 88 kg projectile at a velocity of 161 m/s directed 40.2 deg. above the horizontal. If the mass of the cannon and carriage is 4371.25 kg, find the recoil velocity of the cannon.

I used m1v1 = m2v2 to solve.

88 * cos40.2 * 161 = 4371.25 * V

V = 2.4756 m/s, the answer was wrong,. then I tried to assume the projectile's speed is relative to the cannon,

88*(161*cos40.2 - V) = 4371.25 * V

V = 2.42674 m/s, still wrong. Can you help me, thanks

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# Homework Help: Cannon recoil speed

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