Integrated Science
Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 2.9, Problem 11SC

A ball is swinging in a circle on a string when the string length is doubled. At the same velocity, the force on the string will be

  1. a. twice as great.
  2. b. four times as great.
  3. c. one-half as much.
  4. d. one-fourth as much.
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10. Can the following be reasonably modeled as a central force with constant r? Answer Yes or No. a. A ball on a string is swung in a horizontal circle. b. A ball on a string is swung in a vertical circle. c. A satellite orbits the earth. d. A satellite spirals into a black hole. e. A car makes a U turn at constant speed. f. A child rides on a merry-go-round. g. An ant rides on a slowing turntable.
2. A car driving on the highway is moving at 60 miles per hour. As the car nears an exit ramp, the car slows to 35 miles per hour, a speed that is maintained throughout the circular path of the exit ramp. What force is keeping the car on its path (i.e. in circular motion)? a.Centripetal forceb. Momentumc. Normal forced. Weight of the car (gravity)
A 95 kg male and a 65 kg female are stranded in deep space separated by a distance of 15 m. If they have no means of propulsion, calculate the following a. The gravitational force between them. b. The acceleration of each individual. c. How long it will take for them to come together. d. Where they meet, as measured from the males original position.
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Position/Velocity/Acceleration Part 1: Definitions; Author: Professor Dave explains;https://www.youtube.com/watch?v=4dCrkp8qgLU;License: Standard YouTube License, CC-BY