To keep the planets revolving around the sun the centripetal force is provided by:
Correct answer: A. The gravitational pull
- A. The gravitational pull
- B. Inertia of the planets
- C. Momentum
- D. Some unknown force
Explanation
Solution: The correct option is A Gravitational Force Gravitational force is the source of the centripetal force that a planet requires revolving around the Sun. This force depends on the product of the masses of the planet and sun and the distance between them. If the force becomes zero, due to lack of centripetal force, the planet would move tangentially outward to the circular path.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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