Question

Qi. What is the source of centripetal force that a planet requires to revolve
around the sun? On what factors does that force depend?
Q2. Suppose gravity on Earth suddenly becomes zero then in which direction
will the moon begin to move if no other celestial body affects it?
Q3. In which direction does the buoyant force on an object immersed in a
liquid act?
Q4. Why is G called universal constant?
Q5. What do you mean by buoyancy?
Q6. Do all bodies immersed in a given fluid experience the same buoyant
force?
Q7. What should be the value of the relative density of a substance so that it
may sink in water?
Q8. If an iron ball exerts a gravitational force f on a rubber ball. How much
force with the rubber ball exert on the iron ball? Explain.​

Answer 1

the connection between mass and gravity

Answer 2

Answer:

gravitational force

The source of centripetal force is the gravitational force between the planet and Sun. Gravitational force depends on the mass of the planet, mass of the Sun and distance between them