The motion of a freely falling body is an example of _______________________

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Question
The motion of a freely falling body is an example of ________________________ motion.
Options
A. uniformly accelerated
B. non-uniformly accelerated
C. constant velocity
D. constant speed

Correct Answer

uniformly accelerated

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1. Which of the following pair is INCORRECT? I. Parsec - Distance II. Barrel - Liquid III. Light year - Time
Options
A. Only III
B. Only I and III
C. Only II
D. All are correct

Discuss

Correct Answer: Only III

2. At what temperature (in degree celsius), the numerical values on Celsius and Fahrenheit scales become equal?
Options
A. ?40
B. 40
C. 273
D. -273

Discuss

Correct Answer: ?40

3. For which of the following game, players must have the knowledge of Pascal's law?
Options
A. Climbing
B. Paragliding
C. Rafting
D. Scuba diving

Discuss

Correct Answer: Scuba diving

4. The fact that the planets move around the Sun, not in circles but in ellipses, was first demonstrated by
Options
A. Galileo
B. Martin Luther
C. Johannes Kepler
D. Copernicus

Discuss

Correct Answer: Johannes Kepler

Explanation:

Kepler?s laws of planetary motion state that (a) All planets move in elliptical orbits with the Sun at one of the focal points (b) The radius vector drawn from the sun to a planet sweeps out equal areas in equal time intervals. This follows from the fact that the force of gravitation on the planet is central and hence angular momentum is conserved. (c) The square of the orbital period of a planet is proportional to the cube of the semi major axis of the elliptical orbit of the plane.