Concept explainers
The Moon and Earth rotate about their common center of mass, which is located about 4700 km from the center of Earth. (This is 1690 km below the surface.)
(a) Calculate the magnitude of the acceleration due to the Moon's gravity at that point.
(b) Calculate the magnitude of the centripetal acceleration of the center of Earth as it rotates about that point once each lunar month (about 27.3 d) and compare it with the acceleration found in part (a). Comment on whether or not they are equal and why they should or should not be.
Trending nowThis is a popular solution!
Chapter 6 Solutions
College Physics
Additional Science Textbook Solutions
Sears And Zemansky's University Physics With Modern Physics
Physics: Principles with Applications
University Physics Volume 2
Conceptual Physics (12th Edition)
University Physics with Modern Physics (14th Edition)
College Physics (10th Edition)
- Estimate the gravitational force between two sumo wrestlers, with masses 220 kg and 240 kg, when they are embraced and their centers are 1.2 m apart.arrow_forwardIf a spacecraft is headed for the outer solar system, it may require several gravitational slingshots with planets in the inner solar system. If a spacecraft undergoes a head-on slingshot with Venus as in Example 11.6, find the spacecrafts change in speed vS. Hint: Venuss orbital period is 1.94 107 s, and its average distance from the Sun is 1.08 1011 m.arrow_forwardA door in a hospital has a pneumatic closer that pulls the door shut such that the doorknob moves with constant speed over most of its path. In this part of its motion, (a) does the doorknob experience a centripetal acceleration? (b) Does it experience a tangential acceleration?arrow_forward
- Where on the Earth's surface is the centrifugal acceleration due to its rotation the least? Why?arrow_forwardYOU WISH TO PUT A 1000-KG SATELLITE INTO A CIRCULAR ORBIT 300 KM ABOVE THE EARTH'S SURFACE. WHAT SPEED, PERIOD AND RADIAL ACCELERATION WILL IT HAVE?arrow_forwardA planet orbits a star, in a year of length 2.77 x 107 s, in a nearly circular orbit of radius 3.78 x 1011 m. With respect to the star, determine (a) the angular speed of the planet, (b) the tangential speed of the planet, and (c) the magnitude of the planet's centripetal acceleration.arrow_forward
- If you are in a car that rounds a curve, and you are not wearing a seat belt, and you slide across your seat and slam against a car door, what kind of force is responsible for your slide—centripetal, centrifugal, or no force? Why is the correct answer “no force”?arrow_forwardWhen the radius is constant does the centripetal force vary when the mass of the rotating object is increase? Why or why not?arrow_forwardHow much centripetal force (in N) is required to keep an object with mass 2.5kg moving uniformly in a circle of radius 0.33m at a constant linear speed of 1.7m/s?arrow_forward
- Classical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningUniversity Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning