A 40-Kg Block Starts from Rest and Slides 5

question 19

Multiple Choice

A 4.0-kg block starts from rest and slides 5.0 m down a plane inclined at 60º to the horizontal.The coefficient of kinetic friction between the surface and the block is 0.20.The work done by friction on the block is

• A)98.0 J
• B)19.6 J
• C)3.92 J
• D)3.40 J
• E)64.0 J

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Definitions:

Integral Proteins

Proteins that are permanently attached to the membrane, serving various roles such as transport, cell adhesion, and functioning as enzymes.

Plasma Membrane

The semi-permeable membrane that surrounds the cytoplasm of a cell, controlling the movement of substances in and out.

Membrane-Bound Receptors

Proteins located on the cell surface involved in transmitting signals from the outside to the inside of the cell.

Receptor Sites

Specific locations on cell membranes or within cells where particular molecules, such as hormones or neurotransmitters, can bind and elicit a physiological response.