Question

An object of mass m, initially moving at 3.7 along the x-axis, explodes into two pieces....

An object of mass m, initially moving at 3.7 along the x-axis, explodes into two pieces. The first piece, 85 percent of the mass, moves along the negative x-axis at 6.43 m/s. Find the speed, in m/s, of the other piece right after the explosion.

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Momentum is conserved because no external force acts on system.

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