Escape velocity of a body of 1 kg. On a planet is 100 ms^(-1). Gravitational potential energy of the body at the planet is .........

Escape velocity of a body of 1 kg. On a planet is 100 ms^(-1). Gravita

1.	Escape velocity of a body of 1 kg. On a planet is 100 ms^(-1). Gravitational potential energy of the body at the planet is .........
Answer» `-5000` J `-1000 J ` `-2400 J ` 4000 J SOLUTION :`v_(e) = SQRT((2Gm)/(R)) rArr (100)^(2) = (2GM)/(R) rArr(GM)/R = 5000` ` :.P.E ., U = -(GMm)/2 =-5000 J `