Please answer question 1(a+b+c): ROTATIONAL MOTION Name 1. A bicycle wheel is mo
ID: 1312896 • Letter: P
Question
Please answer question 1(a+b+c):
ROTATIONAL MOTION Name 1. A bicycle wheel is mounted on a fixed. frictionless axle. string is A light wound around the situation at three different is to the string at its free end. The diagrams below depict the instants: At the weight is released from rest. At I tr. the weight is falling and the string is still partially wound around the wheel At the weight and string have both reached the ground. String Weight and Weight released Weight string from res falling Note: The above diagrams do not represent stroboscopic photographs of the wheel.Explanation / Answer
a) t1 - angular velocity is zero
t2 - angular velocity directed into page (using right hand rule)
t3 - same as t2 since wheel is still rotating (consant rate)
b) t1 - angular acceleration positive as soon as weight released
angular acceleration also into page since angular velocity increasing
t2 - angular acceleration same as at t1
t3 - angular acceleration is zero since wheel rotating at constant rate
c) since centripetal acceleration proportional to (angular velocity)^2
t1 - zero (since rotational speed is zero)
t2 - greater than zero
t3 - greatest angular velocity has been attained