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Work Power and Energy question

2018 · 16 Apr · Shift 1 · Q67
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Work Power and Energy question

2018 · 16 Apr · Shift 1 · Q67

JEE MainPhysicsWork Power and EnergyMCQ+4 / −1
A body of mass m starts moving from rest along x-axis so that its velocity varies as υ=as\upsilon = a\sqrt sυ=as​ where a is a constant and s is the distance covered by the body. The total work done by all the forces acting on the body in the first t seconds after the start of the motion is :
  1. A
    18 {1 \over 8}\,81​ m a4 t2
  2. B
    8 m a4 t2
  3. C
    4 m a4 t2
  4. D
    14 {1 \over 4}\,41​ m a4 t2
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