A Block Is Attached to the End of an Ideal

question 60

Multiple Choice

A block is attached to the end of an ideal spring and moved from coordinate x_i to coordinate x_f.The relaxed position is at x = 0.The work done by spring is positive if:

• A)x_i = 2 cm and x_f = 4 cm
• B)x_i = -2 cm and x_f = 4 cm
• C)x_i = -2 cm and x_f = -4 cm
• D)x_i = 2 cm and x_f = -4 cm
• E)x_i = -4 cm and x_f = -2 cm

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Definitions:

Terpene

A large class of organic compounds produced primarily by plants and insects, characterized by their multiples of isoprene units.

Triglyceride

A type of fat found in blood, made of three fatty acids attached to a glycerol backbone, stored in adipose tissue.

Lecithin

A fatty substance found in plant and animal tissues, acting as an emulsifier in food products.

Long-chain Alcohols

Alcohols containing a long chain of carbon atoms, typically more than twelve, used in detergents, emulsifiers, and solvents.