One 2.6-kg paint bucket is hanging by a massless cord from another 2.6-kg paint bucket, also hanging by a massless cord. Required:
a. If the buckets are at rest, what is the tension in each cord?
b. If the two buckets are pulled upward with an acceleration of 1.50 m/s2 by the upper cord, calculate the tension in each cord.

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

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i would say the answer is food.

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c) up

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mass and volume are the answers you are looking for