Question

To test the impact resistance of a new material, a steel ball is shot through bricks of the material. Two bricks, each with a mass of 1.6 kg, are resting on a frictionless surface, a short distance apart from each other. A steel ball, with a mass of 0.13 kg, is shot into the first brick with a velocity of 209 m/s, and after passing through the first brick, it embeds itself in the second brick. The first brick has a velocity of 2.38 m/s right after the ball leaves. What is the velocity of the second brick with the embedded ball?

Answer 1

1.619 ma m. - brick I = brick 2 m = mass of ball = 0.13128 UNO - to initial velocity : 209 m/sec V6, - Velocity of hauck ( = 2-38 m/sec V = Velocity of ball after leaving bruck 1 Using conservation of momentum mqVb, tm vi 0.13x209 - 1.6x2.38 013 - mu Va 27.17 - 3.808 0.13 = 179.7 m/sec tet Velocitly of brick 2 with ball ul => mV = matmu 0.13 X 179.7 1.73 د (ارد 13.50 m/set