# Physical Science

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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 -

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

• Physical Science -

• Physical Science -

No. divide each side by 100

(160+120)/100 = V

You have to calculate that.

• Physical Science -

Thank you!!

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