Asked by Jacob

A 69 kg roller blader, is on a frictionless surface at rest, he then tosses a 4.0 kg rock that has a velocity given by v=3i+4jm/s, the axes are both in the horizontal plane. Find the x component and y component of the subsequent velocity of the roller blader?

I think tis is a momentum problem but i do not know where to start.Any help would be greatly appreciated.
Answered by bobpursley
momentum is conserved
forward momentum= 4(3i+4j)
reaction moentum=-4(3i+4j)
reaction velocity=-4/69 (3i+4j)

Answered by Jacob
wHAT DO I DO WITH THESE VALUES THEN...
Answered by bobpursley
Goodness. I gave you the answer, with the work.
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