you can choose (True, False, Greater than, Less than, Equal to) please explain e

Question

you can choose (True, False, Greater than, Less than, Equal to)

please explain each answer>>>

The path of a very small satellite S in an elliptical orbit around a massive spherical planet P is shown in the figure. The distance from 3 to 4 is the same as from 4 to 5, 9 to 10, and 10 to 11. For the orbit of S shown, P could be located at X. S has a minimum speed at '10' The angular momentum of S is constant The speed at S at position '8' is ... at '2'. The PE of S varies with position. The total PE + KE at '2' is .... at '8'. The magnitude of the force on S at '8' is ... at '2' Incorrect. Tries 1/8 Previous Tries

Explanation / Answer

1. True

ellipse has two focus.

2. from energy conservation, PE + KE = constant

PE = - G M m / r

at 10, r is minimum hence PE will be minimum. (maximum with negative sign)

KE will be maximum.

hence v will be maximum

False

3. angular momentum will be conserved.

True

4. 8 is closer rather than 2

hence speed at 8 is greater than at 2.

Ans: Greater than

5. True

(PE is function of distance from planet that is changing)

6. from energy conservation, PE + KE = constant

equal to

7. F = G M m / r^2

for 8, r is smaller hence F will be greater.

Ans: Greater than

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