Homework Help: Physics

Posted by Fg on Friday, April 1, 2011 at 4:49pm.

A boy on a 2.2kg skateboard initially at rest tosses a 7.9kg jug of water in the forward direction.
If the jug has a speed of 3.2m/s relative to the ground and the boy and skateboard move in the opposite direction at .56m/s, find the boy's mass.
Answer in units of kg.

Physics - bobpursley, Friday, April 1, 2011 at 6:02pm
initial momentum= final momentum
0=(M+2.2).56+7.9(-3.2)

solve for M
Physics - Anonymous, Thursday, December 8, 2011 at 7:38pm
24.048 kg

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