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Chandan Das Grade: Upto college level
        

1.The length of the seconds hands of a clock is 1cm.The change in velocity in its tip is what?


2.A body starts moving with velocity u=10m/s.It experiences a retardation equal to 0.2v2 .Its velocity after 2s is what?

7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear Chandan das


given retardation = 0.2v2


or  -dv/dt =0.2v2


     -dv/v2=0.2 dt


 intigrate


1/V = 0.2t +c


now use initial condition  at t= o ,v=10 m/sec


so    c= 0.1


equation become 


 1/V = 0.2t +0.1




so at t=2 sec


1/v = 0.4+0.1


v= 2 m/sec


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Badiuddin

7 years ago
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