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Q. 56

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 626

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Short Answer

A metal cube and a metal cube are apart, measured between their centers, on a horizontal surface. For both, the coefficient of static friction is. Both cubes, initially neutral, are charged at a rate of . How long after charging begins does one cube begin to slide away? Which cube moves first?

A metal cube begins to slide away at a charge of with time.

A metal cube begins to slide away at a charge ofwith time

A metal cube moves first.

See the step by step solution

Step by Step Solution

Step 1: Given values

Step 2: Calculation for charge for  metal cube and  metal cube.

Formula is,

The charges are all the same.

Both side multiplied by

Both sides are split by ,

The charging of metal cube is given by

charging of 4.0 g metal cube is given by

Step 3: Calculation for charging rate for metal cube and  metal cube.

Changing time for metal cube is,

Charging time for metal cube is,

Step 4: Which metal cube moves first.

A metal cube charges about whereas a metal cube charges about metal cube moves first.

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