Homework Help: Physical Science

Posted by Jason on Sunday, September 11, 2011 at 9:54pm.

A 40-kg skater moving at 4 m/s overtakes a 60-kg skater moving at 2 m/s in the same direction and collides with her. The two skaters stick together. What is their final speed?

Physical Science - bobpursley, Sunday, September 11, 2011 at 9:55pm
conservation of momentum
40*4+60*2= (100)V solve for V
Physical Science - Jason (please help), Sunday, September 11, 2011 at 9:57pm
So the answer is 100V
Physical Science - bobpursley, Sunday, September 11, 2011 at 9:59pm
No. divide each side by 100

(160+120)/100 = V

You have to calculate that.
Physical Science - Jason (please help), Sunday, September 11, 2011 at 10:02pm
Thank you!!

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