A Block of Mass M Is Initially Moving to the Right

question 50

Multiple Choice

A block of mass m is initially moving to the right on a horizontal frictionless surface at a speed v. It then compresses a spring of spring constant k. At the instant when the kinetic energy of the block is equal to the potential energy of the spring, the spring is compressed a distance of:

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Definitions:

Polymer

A molecule built up from repeating subunits of the same general type (monomers); examples include proteins, nucleic acids, or polysaccharides.

Amphipathic Molecule

A molecule containing both hydrophobic and hydrophilic regions.

Hydrophobic End

The part of a molecule that repels water, often found in molecules like lipids that have both hydrophilic (water-attracting) and hydrophobic (water-repelling) ends.

Hydrophilic End

The part of a molecule that is attracted to water, allowing it to dissolve or interact favorably with water molecules.