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Question

The displacement of body of mass 4 kg varies with time (t) as S = t2 + 3t where S is in meters and t is in seconds. The work done by all the forces acting on the body during the time interval t = 0 s to t = 2 s is

4 kg द्रव्यमान के पिण्ड का विस्थापन, समय (t) के साथ S = t2 + 3t के अनुसार परिवर्तित होता है, जहाँ S मीटर में है तथा t सेकण्ड में है। समय अन्तराल t = 0 s से t = 2 s के दौरान पिण्ड पर कार्यरत सभी बलों द्वारा किया गया कार्य है

A
64 J
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B
80 J
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C
40 J
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D
70 J
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Solution

The correct option is B 80 J
Solution

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