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Q. 43

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 200

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Short Answer

A 4.4-cm-diameter, 24 g plastic ball is attached to a 1.2-m-long string and swung in a vertical circle. The ball’s speed is 6.1 m/s at the point where it is moving straight up. What is the magnitude of the net force on the ball? Air resistance is not negligible.

The Net force on the ball is = 0.7308 N

See the step by step solution

Step by Step Solution

Step 1: Given Information 

Ball diameter = 4.4-cm-diameter,

mass =24 g

String length = 1.2-m

v= 6.1 m/s

Step 2 Explanation

First draw a diagram as below

From the figure find the T as below

So the radius will be = 1.2m+2.2 cm = 1.222m

Centripetal force is given by

This force is equal to tension on the string

So the force is 0.7308 N

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