A Rock from a Volcanic Eruption Is Launched Straight Up

question 3

Multiple Choice

A rock from a volcanic eruption is launched straight up.Which one of the following statements about this rock while it is in the air is correct if you neglect the presence of air?

• A)On the way up, its acceleration is downward and its velocity is upward, and at the highest point both its velocity and acceleration are zero.
• B)On the way down, both its velocity and acceleration are downward, and at the highest point both its velocity and acceleration are zero.
• C)Throughout the motion, the acceleration is downward, and the velocity is always in the same direction as the acceleration.
• D)The acceleration is downward at all points in the motion.
• E)The acceleration is downward at all points in the motion except that is zero at the highest point.

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Definitions:

Depreciation

The process of allocating the cost of a tangible or physical asset over its useful life, reflecting the asset's consumption or wear and tear.

Indirect Factory Wages

Wages paid to workers who are not directly involved in production, such as supervisors and maintenance staff, considered part of manufacturing overhead.

Supervisory Salaries

Financial compensation awarded to employees who are in charge of overseeing and managing other workers.

Machine Hours

A measure of the amount of time a machine is operated, used as a basis for allocating factory overhead costs to products.