The gravitational field in a region is given by g → = 5 i ^ + 12 j ^ N kg - 1 . The change in the gravitational potential energy of a particle of mass 2 kg when it is taken from the origin to a point 7 m , - 3 m is

Question

The gravitational field in a region is given by g → = 5 i ^ + 12 j ^ N kg - 1 . The change in the gravitational potential energy of a particle of mass 2 kg when it is taken from the origin to a point 7 m , - 3 m is, 71 J, 1 3 5 8 J, 2 J, 1 J

MARKS App · Accepted Answer

d V = - E → . d r → ⇒ ∆ V = - E → . ∆ r → = - 5 i ^ + 1 2 j ^ · 7 i ^ - 3 j ^ = - 3 5 - 3 6 = 1 ⇒Δ U = m Δ V = 2 J

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