Collision and friction question

In summary, collision is the physical interaction between two objects that results in a change in motion or energy, while friction is the force that resists the motion between two surfaces in contact. Collisions can either increase or decrease the motion of an object, depending on the type of collision and the objects involved. Factors such as surface nature, applied force, and lubricants can affect the amount of friction between two surfaces. Friction can be both harmful and helpful, as it can cause wear and tear or slow down motion, but also provide necessary traction or prevent sliding. To reduce friction, lubricants, smoother materials, or opposite forces can be used, as well as reducing weight or contact area.
  • #1
el_diablo549
11
0

Homework Statement


This is just a question relating to an assignment I am doing, if a steel block mass m1 traveling at velocity v1 and friction of 0.1 hits a concrete barrier traveling at 0 with mass m2 with friction 0.6. they have an inelastic collision and travel 0.1m together.

Homework Equations


frictional force = mg*coefficient of friction
g=gravity=9.81m/s

The Attempt at a Solution


for this period of travel, is the friction force acting on the both items = m1*g*0.1+m2*g*0.6
or is it
(m1+m2)g*0.6?
 
Last edited:
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  • #2
I would guess the former.
 

FAQ: Collision and friction question

1. What is the difference between collision and friction?

Collision is the physical interaction between two objects that results in a change in motion or energy. Friction is the force that resists the motion between two surfaces in contact.

2. How do collisions affect the motion of objects?

Collisions can either increase or decrease the motion of an object, depending on the type of collision and the objects involved. In elastic collisions, the total kinetic energy is conserved and the objects will bounce off each other with no loss of energy. In inelastic collisions, some of the kinetic energy is lost and the objects will stick together after impact.

3. What factors affect the amount of friction between two surfaces?

The amount of friction between two surfaces is affected by the nature of the surfaces (roughness, texture, and material), the amount of force applied, and the presence of any lubricants.

4. Can friction be both harmful and helpful?

Yes, friction can be both harmful and helpful. It can be harmful in cases where it causes wear and tear on surfaces or slows down the motion of objects. However, it can also be helpful in situations where it provides necessary traction or prevents objects from sliding or slipping.

5. How can we reduce friction?

Friction can be reduced by using lubricants (such as oil or grease) between two surfaces, using smoother or more slippery materials, or by applying a force in the opposite direction of the friction force. Additionally, reducing the weight or contact area of the objects can also decrease the amount of friction.

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