Question

a planet is revolving around the sun in an elliptical orbit maximum and minimum distances of planets from sun or 3*10¹² and 2*10¹⁰m respectively. The speed of planet when it is nearest to sun is 2*10⁷ metre per second. what is the speed of the planet when it is farthest from sun?​

Answer 1

Answer:

Correct option is

C

40

We have:

dt

dA

=

2

1

r

2

dt

dθ

4×10

16

=

2

1

(2×10

12

)

2

dt

dθ

ω=

dt

dθ

=2×10

−8

Using, v=rω

We get: v=2×10

12

×2×10

−8

=40 km/s