A 20-G Bullet Is Fired into a 2

question 49

Multiple Choice

A 20-g bullet is fired into a 2.0-kg block of wood placed on a horizontal surface.The bullet stops in the block.The impact moves the block (+ bullet) a distance of 5 m before it comes to rest.If the coefficient of kinetic friction between the block and surface is 0.25,calculate the speed of the block (+ bullet) system immediately after impact.

• A)20 m/s
• B)3.5 m/s
• C)25 m/s
• D)5.0 m/s
• E)2.2 m/s

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