​(a) State with reason the total momentum of the trolleys when they are just released (2mks)
​Zero (0) –It is because their velocities are still zero/ They are still stationary
​(b) Calculate the initial acceleration of trolley A when released (3mks)(c) The velocity of the trolley B is 0.9ms-1 just before it collides with A. Determine the velocity of A just before the collision​(d) Which trolley covers a longer distance before collision? Explain (2mks)
​trolley A, because of it moves with high velocity
​(e) Explain why the elastic strip may not stretch to the same original length after impact (2mks)
​Friction force
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