Question

A planet moves in an elliptical orbit with sun at one of its focii
1) In path QRP work done by gravity is positive .
2) In path PSQ work done by gravity is negative .
3) Linear velocity of rotation from Q to P via R decreases.
4) Gravitational potential energy increases in going from P to Q via R

Answer 1

Gravitational potential energy increases in going from p to quantify via R. This is a answer of this question..