A Block Is Supported on a Compressed Spring,which Projects the Block

question 31

Multiple Choice

A block is supported on a compressed spring,which projects the block straight up in the air at velocity $\overrightarrow { \mathbf { v } } = v _ { 0 y } \hat { \mathbf { j } }$ .The spring and ledge it sits on then retract.You can win a prize by hitting the block with a ball.When should you throw the ball and in what direction to be sure the ball hits the block? (Assume the ball can reach the block before the block reaches the ground and that the ball is thrown from a height equal to the release position of the block. )

• A)At the instant when the block leaves the spring,directed at the block.
• B)At the instant when the block leaves the spring,directed at the spring.
• C)At the instant when the block is at the highest point,directed at the block.
• D)At the instant when the block is at the highest point,directed at the spring.
• E)When the block is back at the spring's original position,directed at that position.

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Definitions:

Adaptation

in biology, refers to the process by which organisms adjust to changes in their environment to survive and reproduce, while in psychology, it can denote adjustments in cognitive or behavioral processes.

Organism

An organism is any living entity, ranging from a single-celled life form to more complex multicellular beings, such as humans.

Gestalt Psychology

A theory in psychology that proposes the human mind considers objects in their entirety before, or in parallel with, the perception of their individual parts.

Psychological Phenomena

Events, behaviors, or processes that relate to the mind and are exhibited through actions, thoughts, or emotions.