A student weighing 65 kg moving at 1.5 m/s runs into a student at rest weighing 45 kg. Rhe heavier student continues forward with a speed of 0.5 m/s after the crash. How fast is the smaller student moving after the crash? (in m/s)

Please help with this problem. Thanks!

Cent0rea88 Jan 23, 2018

#1**+2 **

I think this is a conservation of momentum type problem

Momentum before crash = momentum after crash

65 kg x 1.5 m/s = 65 kg x .5m/s + 45 kg x ? m/s

97.5 = 32.5 + 45 x?

?= 1.44 m/s

ElectricPavlov Jan 23, 2018