You and a friend set up an umbrella and chairs at Torrey Pines State Beach. Your friend goes boogie boarding while you read a book. Half an hour later you are surprised to see that your friend has moved south, parallel to the beach. They are still boogie boarding the same distance from shore, in the surf zone. Why did your friend drift parallel to the beach?

True or False (Explain if False) 1. NASA astronauts, Kjell Lindgren, Pilot Bob Hines, Jessica Watkins, and Samantha Cristoforetti, are currently in the International Space Station, and experience apparent weightlessness because they and the station are always in free fall towards the center of the Earth. 2. One of the 82 moons of Saturn is named Dione. The pull of Dione on Saturn is lesser than that of Saturn on Dione. 3. Titan, one of Saturn's moons, does not crash into the surface of Saturn because it is beyond the main pull of the planet’s gravity. 4. Patrick pushes a heavy refrigerator down the Barrens at a constant velocity. Of the four forces (friction, gravity, normal force, and pushing force) acting on the bicycle, the greatest amount of work is exerted by his pushing force. 5. Tethys, one of Saturn's moons, is in a constant free fall towards Saturn.

1. Every particle in the universe attracts every other particle with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them. This force acts along the line joining the two particles. The magnitude of the gravitational force can be written as 2. A 87-kg person and a 78-kg object are near each other. Estimate the magnitude of the gravitational force each exerts on the other. APPROACH This is an estimate: we let the distance between the centers of the two objects be 41.0 m. FG = _____ (Units) 3. A 83-kg person and a 61-kg object are near each other. Estimate the magnitude of the gravitational force each exerts on the other. APPROACH This is an estimate: we let the distance between the centers of the two objects be 39 m. FG = _____ (Units 4. A 65-kg person and a 75-kg object are near each other. Estimate the magnitude of the gravitational force each exerts on the other. APPROACH This is an estimate: we let the…

Earth is the third planet in our solar system. If Earth became the fifth planet in our solar system, how would that affect the gravitationallforce? A. The gravitational force would increase. B. The gravitational force would decrease. C. The gravitational force would remain the same. D. The gravitational force would not change .