2-15 The Figure Shows the Speed as a Function of Time

question 84

Multiple Choice

2-15
The figure shows the speed as a function of time for an object in free fall near the surface of the earth. The object was dropped from rest in a long evacuated cylinder.
-If the same object were released in air, the magnitude of its acceleration would begin at the free-fall value, but it would decrease continuously to zero as the object continued to fall.For which one of the choices given does the solid line best represent the speed of the object as a function of time when it is dropped from rest in air? Note: The dashed line shows the free-fall under vacuum graph for comparison.

• A)a
• B)b
• C)c
• D)d

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Definitions:

Variable Predicts

Indicates how one measured factor can forecast the outcome or changes in another factor, often used in statistical analysis to determine relationships between variables.

Double-blind Procedure

A research method in which neither the participants nor the experimenters know who is receiving a particular treatment, to prevent bias.

Memory-enhancing Drug

A memory-enhancing drug is any substance that is claimed to improve memory, cognitive function, or facilitate accelerated learning.

Research Participants

Individuals who take part in a scientific study or experiment, contributing data through their responses or behaviors.