A Construction Worker Pulls a Box of Tools on a Smooth

question 40

Essay

A construction worker pulls a box of tools on a smooth horizontal floor with a force of 100 N in a direction of 37.0° above the horizontal.The mass of the box and the tools is 40.0 kg.
(a)Draw a free-body diagram for the box.
(b)Calculate the acceleration of the box.
(c)How hard does the floor push up on the box?

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Definitions:

Mechanoreceptors

Sensory receptors responsible for converting mechanical pressures or changes in position into signals that can be interpreted by the nervous system.

Amacrine Cell

A lateral interneuron in the retina of the eye; receives signals from bipolar cells and sends signals back to them or to ganglion cells.

Bipolar Cell

A type of neuron found in the eyes that conducts signals from the photoreceptors to the ganglion cells, integral in the visual pathway.

Cone

(1) In botany, a reproductive structure in many gymnosperms that produces either microspores or megaspores. (2) In zoology, one of the conical photoreceptive cells of the retina that is particularly sensitive to bright light and, by distinguishing light of various wavelengths, mediates color vision. Compare with rod.