A 137-Kg Block Is Held in Place Against the Spring by by a 74-N

question 43

Multiple Choice

A 1.37-kg block is held in place against the spring by a 74-N horizontal external force (see the figure) . The external force is removed, and the block is projected with a velocity v₁ = 1.2 m/s upon separation from the spring. The block descends a ramp and has a velocity v₂ = 1.4 m/s at the bottom. The track is frictionless between points A and B. The block enters a rough section at B, extending to E. The coefficient of kinetic friction over this section is 0.24. The velocity of the block is v₃ = 1.4 m/s at C. The block moves on to D, where it stops. The initial compression of the spring is closest to:

• A) 2.7 cm.
• B) 1.4 cm.
• C) 0.96 cm.
• D) 5.3 cm.
• E) 3.6 cm.

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Definitions:

Repressed Emotions

Emotions that are unconsciously hidden or suppressed due to being deemed unacceptable or threatening by the individual.

Behavioral Form

Behavioral form pertains to the observable actions or responses of an individual in a particular environment or context.

Temper Tantrum

An emotional outburst, typically characterized by crying, screaming, or stubbornness, often occurring in young children as a response to frustration or lack of control.

Regressing

The act of returning to a previous state or condition, often in psychological contexts referring to a return to earlier stages of behavior or development.