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g100num [7]
3 years ago
12

How would you present weight change if earth had twice the mass that it does now

Physics
1 answer:
rosijanka [135]3 years ago
4 0

Twice the mass means twice the acceleration due to gravity which will increase acceleration by the factor of 2 thus the weight will be double the time.

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A projector is placed on the ground 22 ft. away from a projector screen. A 5.2 ft. tall person is walking toward the screen at a
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Answer:

y = 67.6 feet,   y = 114.4/ (22 - 3t)

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For this exercise let's use that light travels in a straight line and some trigonometric relationships, the symbols are in the attached diagram

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For the small triangle. Projector up to the person

         tan θ = y₀ / (L-d)

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         y₀ / (L -d) = y / L

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The distance from the screen (d), we look for it with kinematics

         v = d / t

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we replace

         y = y₀ L / (L - v t)

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         y = 114.4 (22 - 3t)⁻¹

This is the equation of the shadow height change as a function of time

For the suggested distance the shadow has a height of

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The correct option is B.
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