A 11.0-g bullet is fired horizontally into a 102-g wooden block that is initiall

Question

A 11.0-g bullet is fired horizontally into a 102-g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 155 N/m. The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 84.0 cm, what was the speed of the bullet at impact with the block? m/s

Explanation / Answer

energy is conserved ,,,,,,,,,,,=> mv^2/ = kx^2/2,,,,,,where m=11 g,,,,,,k=155 N/m,,,,,,,,x=0.84 m,,,,,,,,,therefore v= speed of the bullet at impact with the block =99.7 m/s

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