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?

Question

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.

bobpursley · Answer

momentum is conserved forward momentum= 4(3i+4j) reaction moentum=-4(3i+4j) reaction velocity=-4/69 (3i+4j)

Jacob · Answer

wHAT DO I DO WITH THESE VALUES THEN...

bobpursley · Answer

Goodness. I gave you the answer, with the work.