Question

# The drawing above is NOT drawn to scale.The drawing represents a planet orbiting some star. The planet is closer to the star as it moves from point 1 to point 2 than it is when it moves from point 3 to point 4 in its orbit. The dotted line shows the orbital path.If the time it takes the planet to get from point 1 to point 2 is equal to the time it takes the planet to get from point 3 to point 4 then which of the following statements is true, according to Kepler's laws of planetary motion?

A
The average speed as the planet travels from 1 to 2 is the same as when it travels from 3 to 4.
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
B
Area 1 in the diagram is equal to Area 2.
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
Area 1 in the diagram is smaller than Area 2.
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
D
The planet moves further from 3 to 4 from 1 to 2.
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
E
The average speed as the planet moves from 3 to 4 is greater than when the planet moves from 1 to 2.
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
Open in App
Solution

## The correct option is B Area 1 in the diagram is equal to Area 2.Correct answer is option B.From Kepler's Second Law, an imaginary line joining a planet and the sun sweeps out an equal area of space in equal amounts of time.The closer the object is,lesser is the gravitational potential energy, large is the kinetic energy and hence the speed.

Suggest Corrections
0
Join BYJU'S Learning Program
Select...
Related Videos
Kepler's Law
PHYSICS
Watch in App
Explore more
Join BYJU'S Learning Program
Select...