A body starting from rest, accelerates at a constant rate a m/s² for some time after which it decelerates at a constant rate b m/s² to come to rest finally. If the total time elapsed is t sec, the maximum velocity attained by the body is given by

Question:

Options :

(a)(ab/a+b)t m/s
(b)(ab/a-b)t m/s
(c)(2ab/a+b)t m/s
(d)(2ab/a-b)t m/s

Answer :

(a)(ab/a+b)t m/s

Answer Steps :

Step 1:

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Four particles each of mass m are placed at the corners of a square of side length l. The radius of gyration of the system about an axis perpendicular to the square and passing through its centre is [EAMCET (Med.) 2000]

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Four particles each of mass m are placed at the corners of a square of side length l. The radius of gyration of the system about an axis perpendicular to the square and passing through its centre is [EAMCET (Med.) 2000]

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