SUBJECT : GENERAL PHYSICS I. NEWTON’S LAW OF UNIVERSAL GRAVITATION 1. If the masses remain the same, but the distance of separation is decreased to one-half the original distance, what happens to gravitational force? A. Gravitational force decreases by a factor of 4 B. Gravitational force increases by a factor of 4. C. Gravitational force will be halved. D. Gravitational force will be doubled. 2. The gravitational force between two identical spheres is given as 4 x 10-5 N. The spheres are separated by a distance of 0.060 m at the center. What is the mass of each sphere? A. 464.6 kilograms B. 46.46 grams C. 46460 grams. D. 464.6 grams 3. Determine the gravitational force between Earth and the Sun. Mass of Earth = 5.972 X 1024 kg. Mass of Sun = 1.988 x 1030 kg. Mean Distance = 149,600,000 km A. 5.43 x 10^22 N B. 4.35 x 10^22 N C. 4.53 x 10^22 N D. 3.54 x 10^22 N

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!