A2 kg blob of putty moving at 3m/s slams into a 2 kg blob of putty at rest calculate the speed of the two stuck together blobs of putty immediately after colliding

The speed of the two stuck together blobs of putty immediately after colliding = 1.5 m/s

Explanation:

 The momentum is conserved before and after collision. That is initial momentum value is equal to final momentum value.

  Initial momentum = 2 * 3+ 2 * 0 =  6 kg m/s

  So final momentum = 6 kg m/s

  Final mass of body = 2 + 2 = 4 kilogram

  Final velocity of body = Final momentum/ Final mass = 6/4 = 1.5 m/s

  So,  the speed of the two stuck together blobs of putty immediately after colliding = 1.5 m/s

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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