In the Figure,a 900-Kg Crate Is on a Rough Surface

question 34

Multiple Choice

In the figure,a 900-kg crate is on a rough surface inclined at 30°.A constant external force is applied horizontally to the crate.While this force pushes the crate a distance of 3.0 m up the incline,its velocity changes from 1.2 m/s to 2.3 m/s.How much work does friction do during this process?

• A) -3700 J
• B) -7200 J
• C) +3700 J
• D) +7200 J
• E) zero

Identify key motor skills development in infants and their significance.

Analyze the impact of external factors such as screen time and caregiver interaction on infant development.

Comprehend the physiological aspects of infant growth, nutrition, and health including the role of breastfeeding and the impact of malnutrition.

Understand the concepts of growth percentiles and their significance in assessing infant health.

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Definitions:

Levels of Arousal

Refers to the physiological and psychological state of being awake or reactive to stimuli.

Performance

Performance refers to the execution or accomplishment of skills, actions, or tasks, measured against predetermined standards or criteria.

Need for Power

A term in psychology referring to an individual's desire to control or influence others.

Need for Achievement

A psychological trait that denotes a person's desire to accomplish difficult tasks and meet high standards of excellence.