A block on a horizontal floor is initially stationary, sliding in the positive d

Question

A block on a horizontal floor is initially stationary, sliding in the positive direction of an x axis, or sliding in the negative direction of that axis. Then the block explodes into two pieces that slide along the x axis. Assume the block and the two pieces form a closed, isolated system. Six choices for a graph of the momenta of the block and the pieces are given in the figure below, all versus time t. Determine which choices represent physically impossible situations. (Select all that apply.)

Explanation / Answer

only a and e are impossible............

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