This is a study guide my teacher gave me but I do not have an answer key so I wo

Question

This is a study guide my teacher gave me but I do not have an answer key so I would like answers for the whole page please

A disk rest the lop of a long ramp at time t-o seconds, and rolls down the is released from at ramp with a constant angular acceleration rale. At the time of t, the disk has reached an angalar speed 2 What will disks atgular speed be at the time of 3t? 12 rad s D. 18 rad's 47, In building a mobile, an artist decides to hang a naster and a blender from opposite ends ofa tood hat is free to pivot from where it is hung by a string. The toaster's mass es 2 kg, the is 3 and the mass ofee 1 s meter-long rod car be considered megligible Where along the rod, measured as the distance from the toaster, must the rod be pivoted in order for it to A. 30 cm B, 60 cm C. 80 cm 48 A 1.o kg box is attached to a horizontal spring which is attached to a wall. The mass is then pulled back 15 cm and released from rest. The following graph shows data collected with a detector for the box's velocity at various memetts in time after it has been oscillating The spring constant (k) of the spring is most near A. 308 NMm B. 7,7 Nhm D. 5.4 Nm

Explanation / Answer

46] here angular acceleration is constant.

alpha = w/t= [2/t]

final angulat velocity = [2/t]*3t = 6 rad/s^2

option b is correct

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