7. You can swing a ball on a string in a vertical circle if you swing it fast enough. Butif you swing too slowly, the string goes slack as the ball nears the top. Explain whythere's a minimum speed to keep the ball moving in a circle.8. A curve in a road has a bank angle calculated and posted for 80 km/h. However, theroad is covered with ice, so you cautiously plan to drive slower than this limit. Whatmight happen to your car? Why?9. Why do airplanes bank when they turn? How would you compute the banking anglegiven the airspeed and radius of the turn? [Hint: Assume an aerodynamic "lift" forceacts perpendicular to the wings].

We are suppose to solve only one question. Please post other question as a separate question.

7. You can swing a ball on a string in a vertical circle if you swing it fast enough. But if you swing too slowly, the string goes slack as the ball nears the top. Explain why there's a minimum speed to keep the ball moving in a circle.

7. You can swing a ball on a string in a vertical circle if you swing it fast enough. But if you swing too slowly, the string goes slack as the ball nears the top. Explain why there's a minimum speed to keep the ball moving in a circle.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Basic Terminology in Mechanics

The area of science and mathematics concerned the motion of the objects, the relation between the force matter, and motion if specified. Forces exerted over the objects result in displacements or changes in the position of an object concerning its environment. This branch of physics keeps its roots in Ancient Greece in the form of the scripts of Aristotle and Archimedes.

Question

7. You can swing a ball on a string in a vertical circle if you swing it fast enough. But
if you swing too slowly, the string goes slack as the ball nears the top. Explain why
there's a minimum speed to keep the ball moving in a circle.
8. A curve in a road has a bank angle calculated and posted for 80 km/h. However, the
road is covered with ice, so you cautiously plan to drive slower than this limit. What
might happen to your car? Why?
9. Why do airplanes bank when they turn? How would you compute the banking angle
given the airspeed and radius of the turn? [Hint: Assume an aerodynamic "lift" force
acts perpendicular to the wings].

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