A 40-Kg Block Is Lowered Down a 37° Incline a Distance

question 2

Multiple Choice

A 4.0-kg block is lowered down a 37° 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:

Delayed Reinforcement

A technique in which a response is followed by a reward not immediately but after a time delay, influencing future behavior.

Immediate Reinforcement

The prompt delivery of a reward or consequence following a behavior, which strengthens the likelihood of that behavior occurring again.

Continuous Reinforcement

A reinforcement strategy where a desired behavior is rewarded every time it occurs, leading to quicker learning of that behavior.

Negative Reinforcement

A behavioral concept where the removal of an undesirable or negative outcome following a behavior increases the likelihood of that behavior being repeated in the future.