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A bullet, mass 15 g, initially moving at 1 100 m s-1 hits and passes through the block, mass 2,0 kg, as shown in the diagram. The block is initially...

A bullet, mass 15 g, initially moving at 1 100 m s-1 hits and passes through the block, mass 2,0 kg, as shown in the diagram. The block is initially at rest. The bullet emerges with a speed of 420 m s-1. The initial speed (in m s-1) of the block after the bullet has emerged is equal to

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