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Aleksandr [31]
3 years ago
7

Imagine standing on a bathroom scale and reading your weight. now lift one foot and read your weight again. does the scale read

more, less or the same weight when you are standing on one foot?
Physics
2 answers:
7nadin3 [17]3 years ago
8 0
Less because now there is less force on the scale and you are unbalanced. Therefore the scale will have a lower number then before.

Vedmedyk [2.9K]3 years ago
3 0

Answer:B

Explanation: Because the weight will be greater with one leg lifted up in the air, it will make the weight more.

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Which of these would make the best telescope?
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Recording the location of a star requires a measurement of:
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The following are possible ways to express the quantity 0.391 (Give ALL correct answers, i.e., B, AC, BCD...) Note: 3.45E-8 is a
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Show that the effective force constant of a series combination is given by 1keff=1k1+1k2. (Hint: For a given force, the total di
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Answer:

1keff=1k1+1k2

see further explanation

Explanation:for clarification

Show that the effective force constant of a series combination is given by 1keff=1k1+1k2. (Hint: For a given force, the total distance stretched by the equivalent single spring is the sum of the distances stretched by the springs in combination. Also, each spring must exert the same force. Do you see why?

From Hooke's law , we know that the force exerted on an elastic object is directly proportional to the extension provided that the elastic limit is not exceeded.

Now the spring is in series combination

F\alphae

F=ke

k=f/e.........*

where k is the force constant or the constant of proportionality

k=f/e

f_{eff} =f_{1} +f_{2}............................1

also for effective force constant

divide all through by extension

1) Total force is

Ft=F1+F2

Ft=k1e1+k2e2

F = k(e1+e2) 2)

Since force on the 2 springs is the same, so

k1e1=k2e2

e1=F/k1 and e2=F/k2,

and e1+e2=F/keq

Substituting e1 and e2, you get

1/keq=1/k1+1/k2

Hint: For a given force, the total distance stretched by the equivalent single spring is the sum of the distances stretched by the springs in combination.

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