A wheel is subjected to uniform angular acceleration

Asked by admin @ in Physics viewed by 351 People

A wheel is subjected to uniform angular

acceleration about its axis. Initially its angularvelocity is zero. In the first 2 sec, it rotates throughan angle 0,; in the next 2 sec, it rotates through anadditional angle 02. The ratio of 0,70, is-(1) 1(2) 2 90(4) 5(3) 3equation for motion wi​

Answered by admin @


Explanation:

Initial angular velocity:

ω0=0

Angle turned through first 2 sec:

θ1 = ω0t+1/2αt^2

=0+1/2[α][2]^2

=2α

Angle turned through first 4 sec: θ1+θ2=ω0t+1/2αt^2

=0+1/2[α][4]^2

=8αSo,θ2=8α−2α

=6α

Ratio:

θ2θ1 = 6a/2a

=3


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