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Q.4

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 177

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Short Answer

Block in is heavier than block and is sliding down the incline. All surfaces have friction. The rope is massless, and the massless pulley turns on frictionless bearings. The rope and the pulley are among the interacting objects, but you’ll have to decide if they’re part of the system.

Yes. The rope and the pulley are among the interacting objects and they’re part of the system.

See the step by step solution

Step by Step Solution

Step 1: Given information

mass of block

mass of block

acceleration due to gravity

Tension on the rope is

friction force between block is

friction force between block

Inclination of the blocks are

Step 2: Explanation

Newton's Second Law, setting all accelerations to zero, implies the following relationships:

The second equation can be substituted into the fourth equation to give

Setting the friction forces to their maximum values

Thus the blocks are said to be connected in a system and the friction forces are also in line with the part of the system.

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