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Q. 41

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 711

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Short Answer

Two small metal cubes with masses 2.0 g and 4.0 g are tied together by a 5.0-cm-long massless string and are at rest on a frictionless surface. Each is charged to +2.0 mC. a. What is the energy of this system? b. What is the tension in the string? c. The string is cut. What is the speed of each cube when they are far apart?

The value of the energy of the system is

The value of tension in the string is

The value of the speed of each cube are and

See the step by step solution

Step by Step Solution

Step 1: Definition of  the potential energy and Tension

The electric potential of the two charges is

and force is

Applying all data

Applying all data

Step 2: Definition of  the energy of cube system 

As the K.E is equals to
Applying all data

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