One object is at rest, and another is moving. The two collide in aone-dimensiona

Question

One object is at rest, and another is moving. The two collide in aone-dimensional, completely inelastic collision. In other words,they stick together after the collision and move off with a commonvelocity. Momentum is conserved. The speed of the object that ismoving initially is 23 m/s. The masses of the two objects are 2.6and 7.5 kg. Determine the final speed of the two-object systemafter the collision for the case (a) when thelarge-mass object is the one moving initially and the case(b) when the small-mass object is the one movinginitially.

Explanation / Answer

a) 7.5*23=(7.5+2.6)v' b)2.6*23=(7.5+2.6)v' a v=17.08m/s b v = 5.92m/s

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