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AP EAMCET2012PhysicsGravitation

The gravitational field in a region is given by equation E =(5 i +12 j ) N / kg . If a particle of mass 2 ~kg is moved from the origin to the point (12 ~m , 5 ~m ) in this region, the change in gravitational potential energy is

Options

  1. A-225 ~J
  2. B-240 ~J
  3. C-245 ~J
  4. D-250 ~J

Correct answer

B. -240 ~J

Step-by-step solution

We have, aligned d V & =-E d r=-(5 i +12 j ) (12 i +15 j ) & =(60+60)=-120 aligned The change in gravitational potential energy U=m d V=2 (-120)=-240 ~J

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