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pallavi pradeep bhardwaj Grade: 12
        

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

7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear pallavi




use the formula


Θ =ωt +1/2 α t2  


now first for 2 sec


a1 = 0 + 1/2 α *4


     =


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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Badiuddin

7 years ago
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