A Ball of Relatively Low Density Is Thrown Upwards

question 49

Multiple Choice

A ball of relatively low density is thrown upwards.Because of air resistance the acceleration while traveling upwards is −10.8 m/s².On its trip downward the resistance is in the opposite direction,and the resulting acceleration is −8.8 m/s².When the ball reaches the level from which it was thrown,how does its speed compare to that with which it was thrown?

• A)It is greater than the original speed upward.
• B)It is the same as the original speed upward.
• C)It is less than the original speed upward.
• D)Without knowing the original speed,this problem cannot be solved.

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Definitions:

Pictorial Stage

A phase in children's drawing development where they begin to create images that resemble the real world, often occurring around ages 4 to 9.

Drawings

Visual representations made on a surface, such as paper, with instruments like pencils, pens, or brushes, often used as a form of expression or communication.

Recognizable Objects

Items or shapes that can easily be identified based on their appearance and characteristics, significant for cognitive development.

Early Childhood

A period from birth to approximately 8 years old, crucial for cognitive, emotional, and physical development.