1. The gravitational force of attraction between the earth and the sun is 1.6×1023 N. What would be the force if the earth were three times as massive? 2. If the masses remain the same but the distance of separation is decreased to one-half the original distance, what happens to gravitational force? Explain your answer in equation form. 3. How much does a woman of mass 50 kg weigh on the earth's surface? What would be her mass 400,000 km above the earth's surface? 4. A bag of ball bearings weighs 21.56 N on Earth and 3.52 N on another planet. What is the acceleration due to gravity on the other planet?

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