A rifle bullet having mass 8.00 grams strikes and embeds itself in a block with mass 0.992 kg which rests on a frictionless, horizontal surface and is joined to a coil spring. The impact compresses the spring 15.0 cm. The spring constant is 300 N/m.
a) Find out the magnitude of the block's velocity just after the impact.
b) Determine the initial speed of the bullet?