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?

Answer 1

conservation of momentum
40*4+60*2= (100)V solve for V

Answer 2

So the answer is 100V

Answer 3

No. divide each side by 100

(160+120)/100 = V

You have to calculate that.

Answer 4

Thank you!!