Inelastic Collisions Video Lessons

Example

# Problem: A bullet of mass mb is fired horizontally with speed viat a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the block, with the bullet in it, is traveling at speed.vfA. Which of the following best describes this collision?B. Which of the following quantities, if any, are conserved during this collision?a. kinetic energy onlyb. momentum onlyc. kinetic energy and momentumd. neither momentum nor kinetic energyC. What is the speed of the block/bullet system after the collision?Express your answer in terms of vi, mw, and mb.

###### FREE Expert Solution

A.

From the description, the collision is perfectly inelastic.

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###### Problem Details

A bullet of mass mb is fired horizontally with speed viat a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the block, with the bullet in it, is traveling at speed.vf

A. Which of the following best describes this collision?

B. Which of the following quantities, if any, are conserved during this collision?

a. kinetic energy only

b. momentum only

c. kinetic energy and momentum

d. neither momentum nor kinetic energy

C. What is the speed of the block/bullet system after the collision?