(II) A 22-g bullet traveling 240 m/s penetrates a 2.0-kg block of wood and emerges going 150 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?

Answer

0.99 $\mathrm{m} / \mathrm{s}$

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Physics 101 Mechanics

Physics

Chapter 7

LINEAR MOMENTUM

Section 1

Momentum and Its Relation to Force

Discussion

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Susan S.

March 29, 2022

A 22g bullet traveling 240 m/s penetrates a 2.0 kg block of wood and emergesgoing 150 m/s. The block is stationary on a fricktionless surface when hit.how fast does it move after the bullet emerges?

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Video Transcript

So you insist. Questioning we initially have a block of hood and sitting on the table is that we have the bullet, so it's flying towards it. That's because I put it in the block B so as the bullet is initially moving into speed, creepy and supply is initially at rest. So the bullet that penetrates the block is is far better in mergers, but we start our sweet. So what happens in this process is that there is more bitter transfer by penetrating the block. Apart of some images, those bullet is transferred to this block, so afterwards, to talk will start going into Oh, let's say PP. Prime as a bullet is, Hooley was a slow start velocity, So this surfaces freakiness. There's some friction for so there is no external force on this whole system that we can use the conservation prevention initially because people I know. So an AP AP finishes a memory. A Block B has, though, curiosity afterwards, it's a V a prime plus MP vehicle crime cough us doesn't move after the word. So we are looking forward. Vehbi crime with your prior equals and a be a minus. The late prime over and be so we can plugging Orson Um brisk and a A Permits to hunt 22 grand is 22 0.0 to 2 children times you 40 meters per second, minus 1 50 meters per second over and B is two kilogram. This gives us a velocity of thereupon 99 meters per second, so the block B will be moving at roughly meters per second and in the same direction as the bullet.

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