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Q. 56

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 259

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Short Answer

A block is attached to a horizontal rope that exerts a variable force , where x is in m. The coefficient of kinetic friction between the block and the floor is Initially the block is at rest at . What is the block’s speed when it has been pulled to ?

The speed of the block when it is pulled to

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Step by Step Solution

Step 1: Given information

The weight of the block

Force exerted by the block to a horizontal rope

The coefficient of kinetic friction between the block and the floor

Step 2: Explanation

The work done on the mass acted upon by a variable force in moving from

Work done on the block is given by

Now,

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