The Figure Shows a Block of Mass M

question 30

Multiple Choice

The figure shows a block of mass m resting on a slope. The block has coefficients of friction with the surface of the slope. It is connected using a very light string over an ideal pulley to a hanging block of mass 2.0 kg. The string above the slope pulls parallel to the surface. What is the minimum mass m so the system will remain at rest when it is released from rest?

• A) 3.3 kg
• B) 2.1 kg
• C) 1.3 kg
• D) 3.6 kg

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Definitions:

Cognitive Miser

A theoretical concept suggesting that humans prefer to take mental shortcuts for decision-making to conserve cognitive energy.

Demand Characteristics

Aspects of a study that give away its purpose or communicate how the participant is expected to behave.

Correlated

When two or more variables have a statistical relationship with each other, indicating that changes in one are associated with changes in the other.

Underlying Construct

Refers to the theoretical concept or psychological variable that is being measured or assessed, but is not directly observable.