Question

The value ofthe gravitational field in a region is given by g = 2i + 3j. What is the change in gravitational potential energy of a particle of mass 5kg when it is taken from the origin O(0,0) to a point P(10, -5)?

• A. 5 J
• B. 10 J
• C. 25 J
• D. 50 J

Answer 1

Answer:

C. 25 J

Gravitational potential energy = (g . P) x m = [(2i + 3j) .(10i – 5j)] x 5 = (20 – 15) x 5 = 25 J.