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Two carts are initially moving to the right on a low-friction track, with cart 1 behind...

Two carts are initially moving to the right on a low-friction track, with cart 1 behind cart 2. Cart 1 has a speed twice that of cart 2 and so moves up and rear-ends cart 2, which has twice the inertia of cart 1.

Q1: Suppose that the the initial speed of cart 2 is vv. What is the speed of cart 1 right after the collision if the collision is elastic?

Express your answer in terms of v.

Q2:What is the speed of cart 2 right after the collision if the collision is elastic?

Express your answer in terms of v.

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