Velma Is in a Train Moving Eastward at 70 M/s

question 22

Multiple Choice

Velma is in a train moving eastward at 70 m/s. She throws a ball toward the rear of the train, throwing it at her normal "throwing speed" of 20 m/s. The ball's velocity relative to Mort, who is standing beside the tracks, is

• A) 50 m/s westward.
• B) 90 m/s eastward.
• C) 20 m/s eastward.
• D) 20 m/s westward.
• E) 50 m/s eastward.

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Definitions:

Main Effect

In an experimental setup, the direct impact that an independent variable exerts on a dependent variable.

Factorial Research

A methodological approach in experiments that involves studying the effects of two or more factors.

Single-Factor Research

A study design where the effects of one independent variable on a dependent variable are examined.

Independent Variables

Variables in an experiment or model that are manipulated or categorized to determine their effect on dependent variables.