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A block of miss 2kg slides down a 30^(@)...

A block of miss `2`kg slides down a `30^(@)` incline which is `3.6`m high At the bottom, it strikes a block or mass `6` kg which is at rest on a horizontall surface. If the colision is elastic, and friction can be ignored, determing (a) the speeds of the two blocks after the collision and (b) how far back up the incline the smaller mass will go.

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The correct Answer is:
`"["402m//s,4.2m//s,1.8m"along incline"]"`
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PHYSICS GALAXY - ASHISH ARORA-LINEAR MOMENTUM & ITS CONSERVATION-unsolved
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