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23 Nov 2019

15 G bullet strikes and becomes embedded into a 2.1 kg block ofwood placed on horizontal surface. Coefficient of kinetic frictionis between the block and surface is.25 and after the impact theblock slides a distance of 9.5 m before it comes to rest.

a) What was the initial speed of the bullet

b) how much kinetic energy did the bullet have beforecollision

c) How much kinetic energy did the block and bullet have just aftercollision?

d) Was kinetic energy conserved in the collision? if not, whathappened to the energy?

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

What was the muzzle speed of the bullet?
A 24g bullet strikes and becomes embedded in a 1.3kg block of woodplaced on a horizontal surface just in front of a gun.

Q: If the coefficient of kinetic friction between the block and thesurface is 0.27 and the impact drives the block a distance of 9.4mbefore it comes to rest, what was the muzzle speed of thebullet?

Thank you!!!!

1. A woodblock of mass mw = 200 g is projected from the ground at a speed v0 = 35 m/s and at an angle θ0 = 50º. When at height h = 24 m the woodblock was hit by a bullet of mass mb = 25 g which was moving at vb = 220 m/s and at an angle θb = 70º. After the collision, the bullet embedded itself in the block and move together and land at point A on the ground. Then they
move on the ground that has a coefficient of kinetic friction µk = 0.5 and starts to compress a 
horizontal spring at point B. The distance between point A and B is 18 m and the spring constant k = 3×102 N/m. The right end of the spring is fixed, and all motions are confined in x-y plane.
(a) Was the collision between the woodblock and the bullet elastic or inelastic? 
Explain quantitively. (6 marks)
(b) Find the maximum height from the ground the block with the bullet reached. (2 marks)
(c) How far is point A from the launch point of the woodblock? (4 marks)
(d) Calculate the velocity at which the block-bullet system lands at point A. What will be the speed of it at point B?
(5 marks)
(e) Determine how much the spring will be compressed when the block-bullet system comes to a rest

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49. A 41 g bullet strikes and becomes embedded in a 1.73 kg blockof wood placed on a horizontal surface just in front of the gun. Ifthe coefficient of kinetic friction between the block and thesurface is 0.28, and the impact drives the block a distance of 11.0m before it comes to rest, what was the muzzle speed of the bulletin meters/second?

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