A planet is moving round the sun in an elliptical orbit as shown, As the planet moves from A to B, which of the following is NOT true ?
- its kinetic energy will decrease
- its potential energy will remain unchanged
- its angular momentum about centre of sun will remain unchanged
- its speed is minimum at A
Answer & explanation
Correct answer: option 3
While going from A to B, K.E. increases and value of PE decreases, where speed is minimum at A. Angular momentum remains unchanged.