Two Boxes Are Connected by a Weightless Cord Running Over

question 15

Essay

Two boxes are connected by a weightless cord running over a very light frictionless pulley as shown in the figure.Box A,of mass 8.0 kg,is initially at rest on the top of the table.The coefficient of kinetic friction between box A and the table is 0.10.Box B has a mass of 15.0 kg,and the system begins to move just after it is released. (a)Draw the free-body diagrams for each of the boxes,identifying all of the forces acting on each one.
(b)Calculate the acceleration of each box.
(c)What is the tension in the cord?

Analyze cost data to determine a firm's optimal production level and associated economic outcomes.

Identify and interpret the short-run supply curve for a purely competitive firm.

Apply the principle of marginal analysis to firm decision-making in purely competitive markets.

Determine the conditions under which a firm should continue production or shut down in the short run.

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Definitions:

Thalamus

A brain structure involved in sensory and motor signal relay and the regulation of consciousness and sleep.

Neurotransmitter

Chemical messengers that cross synaptic gaps between neurons, transmitting messages from one neuron to another.

Dopamine

A neurotransmitter involved in controlling movement and posture, modulating mood, and playing a central role in positive reinforcement and dependency.

GABA

GABA (Gamma-Aminobutyric Acid) is a neurotransmitter in the brain that inhibits nerve transmission, calming nervous activity.