A 0.150 kg glider is moving to the right on a frictionless, horizontal air track

Question

A 0.150 kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.750 m/s . It has a head-on collision with a 0.290 kg glider that is moving to the left with a speed of 2.14 m/s . Suppose the collision is elastic. 1) Find the magnitude of the final velocity of the 0.150 kg glider. 2) Find the magnitude of the final velocity of the 0.290 glider. *note: I have tried .24 and -.24 for both parts and mastering physics says they are incorrect. Help!

Explanation / Answer

We generally do not answer the questions of those who are having low rating. You are having a rating of "86%". Please rate all answers and improve your rating. Even if you find the answers are incorrect, rate them as not helpful. But do rate them for the good of both of us. Thanks!! Coming to the problem m1 = 0.15, u1 = 0.75 m2 = 0.29, u2 = -2.14 m/s Let after collision velocity of m1 is v1 and that of m2 is v2. Collision is elastic =>v1-v2 = u2-u1 =>v2-v1 = u1-u2 = 0.75+2.14 = 2.89 =>v2 = v1+2.89 Initial momentum = Final momentum =>(0.15*0.75)+(0.29*(-2.14)) = (0.15*v1)+(0.29*v1)+(0.29*2.89) =>v1 = -3.06 m/s..... =>the magnitude of the final velocity of the 0.150 kg glider = 3.06 m/s v2 = v1+2.89 =>v2 = -0.17 m/s =>the magnitude of the final velocity of the 0.290 glider = 0.17 m/s

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