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A 4.00g bullet is moving horizontally with a velocity of +355 m/s, where the + sign...

A 4.00g bullet is moving horizontally with a velocity of +355 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 1150g and it's velocity is +0.550 m/s after the bullet passes through it. The mass of the second block is 1530g.

(a) what is the velocity of the second block after the bullet embeds itself?
(b) Find the ratio of the total kinetic energy after the collisions to that before the collisions.

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Answer #1

Mass of bullet

Initial velocity of bullet

Mass of the first block , Mass of second bullet

Velocity of first block

a)

Conserving the moentum of the system before and after collision of bullet with the blocks,

b)

Kinetic energy of the system before collision

Kinetic energy of the system after collision

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