A Spear Is Thrown by You at a Very High

question 58

Multiple Choice

A spear is thrown by you at a very high speed.As it passes,you measure its length at 1/2 its normal length.From this you conclude that the moving spear's mass must be

• A) one-half its rest mass.
• B) twice its rest mass.
• C) four times its rest mass.
• D) None of these choices are correct.

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Definitions:

Psychological Benefits

The positive effects on mental health and well-being that can result from various activities or treatments.

Muscle Weighs

The mass of muscle tissue in the body, which may contribute to overall weight and physical strength.

Physically Active Children

Children who engage in regular physical activity, which supports their physical development, health, and well-being.

Physically Active People

Individuals who engage in a significant amount of physical activity, leading to enhanced physical health and well-being.