A Man Pulls a 100-N Crate Up a Frictionless 30 $\degree$

question 14

Multiple Choice

A man pulls a 100-N crate up a frictionless 30 $\degree$ slope 5 m high as shown. Assuming that the crate moves at constant speed, the work done by the man is:

• A) -500 J
• B) -250 J
• C) 0
• D) 250 J
• E) 500 J

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Definitions:

Solute

A substance that is dissolved in another substance (solvent), forming a solution, which can be a solid, liquid, or gas.

Solvent-water

A substance, in which water acts as the dissolving agent or medium, primarily for solutes.

Semipermeable Membrane

A type of barrier that allows some particles to pass through while preventing others, often used in the context of biological membranes or filtration systems.

Salt

A mineral composed primarily of sodium chloride (NaCl), used in food for flavoring and preservation.