A target glider, whose mass m2 is 390 g , is at rest on an air track, a distance

Question

A target glider, whose mass m2 is 390 g, is at rest on an air track, a distance d = 53 cm from the end of the track. A projectile glider, whose mass m1 is 550 g, approaches the target glider with velocity v1i = -75 cm/s and collides elastically with it (see the figure). The target glider rebounds elastically from a short spring at the end of the track and meets the projectile glider for a second time.

a) How far from the end of the track does this second collision occur ( cm)? =39.5cm

b)How long does the target glider take to reach the end of the track? ??

c)How much more time elapses before the gliders collide again? 45.1s

I only need b), and will award 5 stars for correct answer, with explanation.

Explanation / Answer

.612 s

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