A Concrete Block Is Pulled 7

question 34

Multiple Choice

A concrete block is pulled 7.0 m across a frictionless surface by means of a rope. The tension in the rope is 40 N; and the net work done on the block is 247 J. What angle does the rope make with the horizontal?

• A)28°
• B)41°
• C)47°
• D)62°
• E)88°

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Definitions:

Stereotaxic Procedure

A surgical technique that allows precise positioning of instruments or lesions within the brain using a three-dimensional coordinate system.

Single-Blind Procedure

A research experiment in which only the participants do not know which group (control or experimental) they belong to.

Placebo Effect

The beneficial effect on a patient's health condition following a placebo treatment, due to the patient's belief in the treatment's efficacy.

Sampling Bias

A systematic error in a research study resulting from non-random sampling of participants, leading to unrepresentative sample data.