Conservation of Momentum lab. We did a lab with 5 colissions. 1)m1=m2 2)m1>m2 by

Question

Conservation of Momentum lab.

We did a lab with 5 colissions.

1)m1=m2

2)m1>m2 by 0.1kg

3)m1>m2 by 0.2kg

4)m1<m2 by 0.1kg

1) If the track were tilted, would momentum be conserved in this experiment? Explain why it is so important to have a level track.

2) For collision #4, show that the kinetic energy was not conserved. Where did the energy go? Why does it make sense that it was not conserved?

3) Suppose the two carts were initially hooked together and not moving. A small explosion occurs and they move off in opposite directions. Is momentum conserved? What is the total momentum? Is energy conserved? Explain why or why not.

4) Explain the difference between an inelastic colission, a partially elastic colission and a perfectly elastic colission. Do the colissions in this lab represent one of these? If so, which one? Explain your answer regarding energy and adhesion.

5) Give a good definition of the center of mass of a system of masses. Does the center of mass of the two carts ever change its velocity before, during, or after the collision? Explain why or why not.

Explanation / Answer

1) No momentum not be conserved in this experiment if tilted track is used .as momentum conservation occurs if and only if there is no external force on our system.

2) Kinetic energy is not conserved as it is changed and it is converted to internal mechanical energy(they get deformed ) finally however again mechanical converts to kinetic but that is not same as conserved . conserved means constant through out the process

3) Yes . No external force .. zero momentum . Energy is not conserved as internal energy is converted to particle's kinetic energy also some part is wasted in sound etc.

4)inelastic e=0 (particles will get stick)

perfectly elastic e=1 (velocity of separation = velocity of approach )

partially elastic e<1 e>0

lab is not perfect so partially elastic as particle do not stick but loose some energy so not perfectly elastic.

5) center of mass velocity is mathematical concept which is mass weighted average of velocities.

sa momentum is conserved so Vcm do not change

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.