F4 Chapter 3.2 Kepler's Laws

kepler's first Law state

• An object that is moving will continue to move in a straight line if there is no external force act on it.

• Planets is all sphere in shape

• Planets orbiting the sun with the shape of elliptical.

• Sun is the centre of the universal

A line that connect a planet to the sun sweeps out equal area in equal times. This is

• Kepler's First Law

• Kepler's Second Law

• Kepler's Third Law

• Newton's Universal Law of Gravitation

Diagram shows a planet of mass,m moves in a circular orbit of radius r around the sun of mass,M. The planet take Orbital Period,T to complete one revolution. Which of the following shows the correct relationship between T and m,M,r?

A planet is in circular orbit of radius r around the sun. The period of the orbit is T. Which is the correct expression for the orbital speed v of the planet?

• 4310days

• 3310days

• 2310days

• 1310days

Diagram shows a illustration of Kepler's Second Law. The planet took the same period to move from A to B as compared to moving from C to D through the orbit.

• Area of ABF is equal to area of CDF.

• Area of ABF is more than area of CDF.

• Average speed of planet from A to B is equal to average speed of planet from C to D.

• Average speed of planet from A to B is less than average speed of planet from C to D.

Newton's Universal Law also known as

• Newton First Law of motion

• Inertia Law

• Law of Gravitation

• Newton second Law

Which position of earth will move with the fastest speed?

• A

• B

• C

• D

What is the relationship between orbital period of a planet,T and the radius,r of the planet around the Sun?