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A 186-Kg Block Is Held in Place Against the Spring by by a 81-N

question 72

Multiple Choice

A 1.86-kg block is held in place against the spring by a 81-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 = 1.9 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 0.28. The velocity of the block is v₃ = 1.4 m/s at C. The block moves on to D, where it stops. The height h of the ramp is closest to

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Definitions:

Orphanages

Residential institutions dedicated to the care of children whose parents are deceased or otherwise unable or unwilling to care for them.

Centration

The tendency of young children to focus only on one aspect of an object or situation, a characteristic of preoperational stage of cognitive development.

Egocentrism

A cognitive characteristic where an individual is unable to distinguish between their own perspective and that of others, often observed in early childhood development.

Piagetian Term

Pertains to concepts and terminologies introduced by Jean Piaget in his theory of cognitive development, which outlines how children progress through four stages of cognitive growth.