Question

gent Arlene devised the following method of measuring the muzzle velocity of a rifle (the figure below). She fires a bullet into a 4.076-kgkg wooden block resting on a smooth surface, and attached to a spring of spring constant kkk = 164.8 N/mN/m . The bullet, whose mass is 7.870 gg, remains embedded in the wooden block. She measures the maximum distance that the block compresses the spring to be 9.460 cmcm .
(Figure 1)

What is the speed vv of the bullet?

Express your answer to four significant figures and include the appropriate units.

Answer 1