A 5.00-g bullet is fired horizontally into a 1.20-kg wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.20. The bullet remains embedded in the block, which is observed to slide 0.310 m along the surface before stopping. What was the initial speed of the bullet?
Solution 42E Step 1: Mass of the bullet is, m1= 5 gram = 0.005 kg . Mass of the wooden box is, m = 1.20 kg. 2 Coefficient of kinetic friction, = 0.20. k Distance covered, s = 0.310 m.