You will do an experiment in lab to examine conservation of energy as described

Question

You will do an experiment in lab to examine conservation of energy as described in Investigation 3. A mass of 20.01 g is tied to one end of a thin thread. The other end is wrapped around a small cylinder of radius 0.01254 m. The small cylinder is attached to a much heavier aluminum disk. You calculated the rotational inertia of the aluminum disk in a previous problem in this assignment and hopefully wrote it in your lab manual at the end of Investigation 1.

a) When the mass falls it causes the small cylinder and the aluminum disk to rotate as discussed in Activity 2-1. What should the angular acceleration of the system be?

_____________rad/s2

b) Determine the angular speed of the rotating disks after 5.99 seconds if the hanging mass is released from rest?

_____________rad/s

c) How many radians have the disks rotated after this time?

_____________ rad

d) What is the linear speed and kinetic energy of the dropping mass at this time?

velocity =  m/s
linear kinetic energy =  J

e) What is the kinetic energy of the rotating disks at this time?

________________J

f) Let the zero of the gravitational potential energy be zero when the mass is released at rest. What is the gravitational potential energy of the dropping mass at 5.99 s?

________________ J

g) What is the initial and final mechanical energy of the system?

Initial total mechanical energy = ________________J
Final total mechanical energy = _________________J

Explanation / Answer

increase the points to 1500!! thank you!!

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