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Q.21

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 128

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Short Answer

Exercises 21 show a free-body diagram. Write a short description of a real object for which this would be the correct free-body diagram. Use Examples 5.4, 5.5, and 5.6 as examples of what a description should be like.

The free body diagram is a pictorial representation of an object under some forces where the object acts as an particle and the forces acting on the object.

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Step by Step Solution

Given information:

The object is represented by the dot according to the particle model.

The drag force Fdrag and the force due to gravity FG is acting downward along the negative Y-axis with FG > Fdrag.

The thrust is acting upward along the positive Y-axis.

The net force is drawn beside the diagram which is acting upwards.

Writing the description of real object that explains the given free body diagram:

Example 5.3 is a suitable example for the given free body diagram which states

"A rocket is launched vertically"

The rocket is considered as the particle here.

Since the net force is acting upward,

The thrust is due to the engine of the rocket, force of gravity is due to its mass and drag force is due to the air resistance.

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