Two Identical Crates with 100 Kg Mass Are Being Pushed

question 44

Multiple Choice

Two identical crates with 100 kg mass are being pushed up at a constant speed an inclined plane that is at the angle of 20 degrees above the horizontal. One plane is frictionless, while the coefficient of friction between the crate and the other incline is 0.20. What is the absolute difference in work needed to push the crate a distance of 2.0 m along each plane?

• A) 670 N
• B) 1040 N
• C) no difference
• D) 370 N
• E) 134 N

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Definitions:

Goal

denotes an objective or desired outcome that a person or a system aims to achieve.

Effort

The amount of physical or mental energy expended to achieve a goal or perform a task.

Expectancy-value Theory

A psychological theory that explains motivation and behavior as a function of an individual's expectations for success and the value they place on achieving the goal.

Achievable

A term used to describe a goal or task that is possible to accomplish or attain with effort, skill, or resources.