1. Trial 1: Metal disk a) Set the string aside, we will not be using it for the

Question

1. Trial 1: Metal disk

a) Set the string aside, we will not be using it for the rest of the experiment.

b) There is a disk attached to the system with a set screw holding it in place (see photograph to right). With the system at rest: try dropping the free disk (which is the same size) onto the attached disk so the hole of the free disk passes over the set screw. (The projections on one side of the free disk should be facing upward.) Do this several times, until you can get the hole over the screw each time. Now, remove the free disk.

c) Start the system spinning (not too fast) and click on START. After a few seconds: drop the freel disk onto the disk of the rotating system. If the hole in the free disk does not fall over the set screw; just do it again. After a few more seconds, click on STOP.d) Use the “Smart Tool†of Data Studio to find the angular speed just before you dropped the disk (ωo) and just after the system stopped slowing down (ωf). Record these values on your data sheet.

e) Use the law of conservation of angular momentum to determine the total moment of inertia of the system-plus-disk. Use this to find the angular momentum of the disk alone. Record these values on your data sheet. This will be the experimental value for the moment of inertia.

f) Measure the free disk: use the vernier calipers to measure its diameter, and the balance to measure its mass. Use this data to find the calculated value for the moment of inertia of the disk. Record these values on your data sheet.

g) Find the percent difference between the two values you found for the moment of inertia of the disk (the experimental value from part d, and the calculated value from part e). Record this value on your data sheet.

In procedure 2 trial 1: suppose the system is rotating clockwise when the metal disk is dropped on it. The direction of the frictional force is

counter-clockwise on the disk zero on the system

clockwise on the disk, counter-clockwise on the system

zero on the disk, clockwise on the system

counter-clockwise on the disk and the system

clockwise on the disk, zero on the system

clockwise on the disk and the system

zero on the disk and the system

In procedure 2 trial 1: suppose the coefficient of friction between the metal disk and the system is μ. If the coefficient of frction is increased, what will happen to ωf, the final angular speed of the system, and ΔE, the energy lost from the system during the time the metal disk reaches the same speed as the system?

ωf remains the same, ΔE increases

ωf and ΔE remain the same

ωf decreases, ΔE increases

ωf decreases, ΔE decreases

ωf remains the same, ΔE decreases

ωf increases, ΔE increases

ωf increases, ΔE remain the same

ωf increases, ΔE decreases

Explanation / Answer

Sorry,
Shit man !

tried hard for 1 hour :(
but could'nt find it. :(

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

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