A 135kg merry-go-round is initially at rest, when a student holding the rail begins
to run, generating the normal force shown for 1.7s. The equation for the
moment of inertia of any disk (such as a merry-go-round, neglecting the hand
rails) is I = 1/2mr.
Answer all questions relative to the center of the merry-go-round.
How much torque does she generate?
377 Nm
What is the moment of inertia?
114
kg m^2
What is the angular acceleration?
unit
What is the final angular speed?
rad/s
rpm

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?