A 40-Kg Block Is Lowered Down a 37 $\degree$ Incline a Distance of 5

question 26

Multiple Choice

A 4.0-kg block is lowered down a 37 $\degree$ incline a distance of 5.0 m from point A to point B.A horizontal force (F = 10 N) is applied to the block between A and B as shown in the figure.The kinetic energy of the block at A is 10 J and at B it is 20 J.How much work is done on the block by the force of friction between A and B?

• A)-58 J
• B)-53 J
• C)-68 J
• D)-63 J
• E)-47 J

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Definitions:

Behavior Modification Therapy

A form of psychotherapy that aims to change undesirable behaviors through the use of learning techniques such as reinforcement.

Unconscious Motivating Forces

Internal drives and desires that influence behavior and thought processes without the individual’s conscious awareness.

Successive Approximation

A method of behavioral training that breaks down a desired behavior into smaller, achievable steps, reinforcing closer and closer approximations to the desired behavior.

Shaping (Also Called)

Also known as method of successive approximations, it is a process in behaviorism used to train a new behavior by rewarding actions that are closer to the desired behavior.