Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 1: Q9 DQ (page 356)

9. An object consists of a ball of weight W glued to the end of a uniform bar also of weight W. If you release it from rest, with the bar horizontal, what will its behavior be as it falls if air resistance is negligible? Will it (a) remain horizontal; (b) rotate about its center of gravity; (c) rotate about the ball; or (d) rotate so that the ball swings downward? Explain your reasoning.

Short Answer

Expert verified

The ball and the rod remains horizontal.

Step by step solution

01

Center of gravity

The center of gravity is the point on a body where the total weight of the body is concentrated.

02

Reason for remain horizontal

Every rod is weightless implies there is no net torque in the system connected to the rod.

So, the rod and the ball glued remains horizontal.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

For the hydraulic lift shown in Fig. 12.7, what must be the ratio of the diameter of the vessel at the car to the diameter of the vessel where the force F1 is applied so that a 1520-kg car can be lifted with a force F1 of just 125 N?

You throw a glob of putty straight up toward the ceiling,which is 3.60 m above the point where the putty leaves your hand.The initial speed of the putty as it leaves your hand is 9.50 m/s.

(a) What is the speed of the putty just before it strikes the ceiling?

(b) How much time from when it leaves your hand does it take theputty to reach the ceiling?

Four astronauts are in a spherical space station. (a) If, as is typical, each of them breathes about 500 cm3 of air with each breath, approximately what volume of air (in cubic meters) do these astronauts breathe in a year? (b) What would the diameter (in meters) of the space station have to be to contain all this air?

A Fast Pitch. The fastest measured pitched baseball left the pitcher’s hand at a speed of 45.0m/s. If the pitcher was in contact with the ball over a distance of1.50mand produced constant acceleration, (a) what acceleration did he give the ball, and (b) how much time did it take him to pitch it?

You normally drive on the freeway between San Diego and Los Angeles at an average speed of 105 km/h (65 mi/h), and the trip takes 1 h and 50 min. On a Friday afternoon, however, heavy traffic slows you down and you drive the same distance at an average speed of only 70 km/h (43 mi/h). How much longer does the trip take?
See all solutions

Recommended explanations on Physics Textbooks

Electricity

Read Explanation

Thermodynamics

Read Explanation

Modern Physics

Read Explanation

Mechanics and Materials

Read Explanation

Astrophysics

Read Explanation

Physics of Motion

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free