A 4.71-g bullet is moving horizontally with a velocity of +363 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is negligible. The bullet passes completely through the first block (an inelastic collision) and embeds itself in the second one, as indicated in part b. Note that both blocks are moving after the collision with the bullet. The mass of the first block is 1244 g, and its velocity is +0.677 m/s after the bullet passes through it. The mass of the second block is 1632 g. (a) What is the velocity of the second block after the bullet imbeds itself? (b) Find the ratio of the total kinetic energy after the collision to that before the collision.

Block 1
Block 2
(a) Before collision
block 2
mblock 2 16328
mbullet 4.71g
mblock 1 1244g
(b) After collision

Image Transcription

+363m/s Block 1 Block 2 (a) Before collision +0.677m/s block 2 mblock 2 16328 mbullet 4.71g mblock 1 1244g (b) After collision

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