A 20-Kg Object Moving 3 $\degree$ From Its Initial Direction of Motion

question 71

Multiple Choice

A 2.0-kg object moving 3.0 m/s strikes a 1.0-kg object initially at rest.Immediately after the collision,the 2.0-kg object has a velocity of 1.5 m/s directed 30 $\degree$ from its initial direction of motion.What is the x component of the velocity of the 1.0-kg object just after the collision?

• A)3.7 m/s
• B)3.4 m/s
• C)1.5 m/s
• D)2.4 m/s
• E)4.1 m/s

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Definitions:

Pictorial Competence

The ability to understand and interpret images, drawings, and visual representations effectively.

Symbolic Development

The process by which individuals learn to use symbols, such as words or gestures, to represent objects, actions, thoughts, and ideas beyond their immediate experience.

Dual Representation Hypothesis

Proposal that children under age 3 have difficulty grasping spatial relationships because of the need to keep more than one mental representation in mind at the same time.

Scale Errors

A developmental phenomenon in which young children attempt to perform actions on miniature objects as if they were full-size, indicating a misunderstanding of size and scale.