Question

Two wooden blocks, M1 and M2 are sliding in the same direction at the same speed on a frictionless horizontal surface. Let M1=M2= 3kg and assume their speed is 2 m/s. A third block of mass m = 1 kg is also sliding in the same direction at a speed of 10 m/s, and it collides with the trailing 3 kg block. The third block is covered with a sticky, gooey substance, so it sticks to the trailing block. This combination block catches up and collides elastically with the leading 3kg block. Determine the final speed of the leading block.

Answer 1

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