Physics Problem: Work Done by Friction w/ Bullet & Wood

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In summary, the conversation discusses a physics problem involving a bullet and a wooden block on a table. The bullet has a mass of 2g and the block has a mass of 0.498kg. The bullet becomes embedded in the block, causing it to slide a distance of 0.2m before coming to rest. The question asks for the amount of work done by friction, with a hint to check the definition of work and consider the relationship between the coefficient of friction and the normal force.
  • #1
rajkirann
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Physics problem?
Suppose you shoot a bullet of mass 2g into a wooden block of mass 0.498 kg resting on the table. the bullet gets stuck in the wood, and the block slides a distance of 0.2m before it comes to rest again. how much work is done by the friction if the block with the bullet slides a distance of 0.2m on te table with a frictional coefficient of 0.4?
 
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  • #2
Hint: What's the definition of work?
 
  • #3
Check the definition of work. The relationship between the coefficient of friction and the normal is basically all you need to know because they gave you the distance.
 
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1. What is the concept of work done by friction?

The concept of work done by friction is a measure of the energy that is lost due to the resistance between two surfaces in contact. In other words, it is the amount of energy that is converted into heat as one object moves against another.

2. How is work done by friction calculated?

The work done by friction is calculated by multiplying the force of friction by the distance over which it acts. This can be represented by the equation W = Fd, where W is the work done, F is the force of friction, and d is the distance over which the friction acts.

3. How does the work done by friction affect the motion of objects?

The work done by friction acts in the opposite direction of the motion of the object, causing it to slow down or come to a stop. This is due to the fact that friction converts the kinetic energy of the moving object into heat energy.

4. How is the work done by friction affected by the type of surfaces in contact?

The type of surfaces in contact greatly affects the amount of work done by friction. Rougher surfaces will have a greater amount of friction and therefore more work will be done. Smoother surfaces will have less friction and thus less work will be done.

5. How does a bullet moving through a piece of wood demonstrate the concept of work done by friction?

As a bullet moves through a piece of wood, it experiences friction from the wood fibers. This friction converts the kinetic energy of the bullet into heat energy, causing the bullet to slow down and eventually stop. The work done by friction in this case can be calculated by multiplying the force of friction by the distance the bullet travels through the wood.

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