11. (10 points) An 8 g bullet is shot into a 4.0 kg block, at rest on a frictionless horizontal surface. The bullet remains lodged in the block. The block moves into a spring and compresses it by 3.7 cm. The force constant of the spring is 2500 N/m. (a) What was the velocity of the bullet right before embedding into the wood? (a) 4 (b) How much energy was converted to thermal energy during the collision with the block? Collision DX-D ~~ "\ {Foxt At =0, {P;= {PE MB3 VEB + Mu Yew = (Ms + Mw) Up Spring Compress = Mo V4 - Mo+Mw F Vin + x + K = = U + K 2 Vt's Art Mw) U = k AX collision M (Ms+Mw) 2 50 WEB1 =4637/5