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A wheel is subjectedto uniform angular acceleration about its axisInitially its angular velocity is zero In the first 2 sec it rotates through an angle a1 next 2 sec it rotates through an additional angle a2 the ratio of a2/a1
Dear pallavi
use the formula
Θ =ωt +1/2 α t2
now first for 2 sec
a1 = 0 + 1/2 α *4
=2α
now angel rotate in next 2 sec = angel rotate in 4 sec - angel rotate in first 2 sec
a2 = 1/2 *α* 16 - 2α
= 6α
so a2/a1 = 3
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