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Serggg [28]
3 years ago
15

A dog pulls on his leash with a 10-N force to the left. Identify the reaction force

Physics
1 answer:
GREYUIT [131]3 years ago
5 0
The reaction force is 10N to the right

its <span>comes from tension in the leash</span>
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Around 2.8212 sec

Explanation:

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A spring with spring constant 450 N/m is stretched by 12 cm. What distance is required to double the amount of potential energy
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Answer:

<em> The distance required = 16.97 cm</em>

Explanation:

Hook's Law

From Hook's law, the potential energy stored in a stretched spring

E = 1/2ke² ......................... Equation 1

making e the subject of the equation,

e = √(2E/k)........................ Equation 2

Where E = potential Energy of the stretched spring, k = elastic constant of the spring, e = extension.

Given: k = 450 N/m, e = 12 cm = 0.12 m.

E = 1/2(450)(0.12)²

E = 225(0.12)²

E = 3.24 J.

When the potential energy is doubled,

I.e E = 2×3.24

E = 6.48 J.

Substituting into equation 2,

e = √(2×6.48/450)

e = √0.0288

e = 0.1697 m

<em>e = 16.97 cm</em>

<em>Thus the distance required = 16.97 cm</em>

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