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Questions and Answers
Which force acts on an object moving along a circle and is directed towards the center of the circle?
Which force acts on an object moving along a circle and is directed towards the center of the circle?
- Centripetal force (correct)
- Frictional force
- Gravitational force
- Electromagnetic force
What is Kepler's first law of planetary motion?
What is Kepler's first law of planetary motion?
- The line joining the planet and the Sun sweeps equal areas in equal intervals of time.
- The period of revolution of a planet around the Sun is directly proportional to the mean distance of the planet from the Sun.
- Planets revolve around the Sun in circular orbits.
- The orbit of a planet is an ellipse with the Sun at one of the foci of the ellipse. (correct)
What is Kepler's third law of planetary motion?
What is Kepler's third law of planetary motion?
- The square of the period of revolution of a planet around the Sun is inversely proportional to the mean distance of the planet from the Sun.
- The period of revolution of a planet around the Sun is directly proportional to the mean distance of the planet from the Sun. (correct)
- Planets revolve around the Sun in circular orbits.
- The line joining the planet and the Sun sweeps equal areas in equal intervals of time.
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