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DENIUS [597]
3 years ago
12

Rebecca jogs in place for two minutes before her track meet. Rebecca weighs 100 pounds. Which of the following statements is tru

e?
A Rebecca has done 200 foot-pounds of work.
B Rebecca has not done work because she has not moved a distance.
C Rebecca would accelerate more quickly is she weighed 120 pounds.
D Rebecca has done 100 foot-pounds of work.
Physics
2 answers:
MrRissso [65]3 years ago
7 0
The answer is A because it was 2 minutes and she weighs 100 lbs.... so 2(100)=200.... 200 lbs of work
Nataly_w [17]3 years ago
7 0

Answer:

B. Rebecca has not done work because she has not moved a distance.

Explanation:

In physics, work represents the amount of energy necessary for a force to move a body a certain distance.

W=F.d, where <em>F</em> is the force, <em>d</em> the distance and <em>W</em> the work of the force <em>F.</em>

Since Rebecca jogs in place, the distance is zero, an so does the work.

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A 9.0-V battery (with nonzero resistance) and switch are connected in series across the primary coil of a transformer. The secon
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Answer:

N₂ / N₁ = 13.3

Explanation:

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s good clarify that in transformers the voltage must be alternating (AC)

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