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Elena L [17]
3 years ago
7

PLEASE HELP WITH THIS QUESTIONWhat of Newton's 3 laws is this picture​

Physics
1 answer:
Reptile [31]3 years ago
7 0

Answer:

Hey

Newtons 1rst law (the penny isint moving, it will remain that way)

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The force an ideal spring exerts on an object is given by Fx = -kx, where x measures the displacement of the object from its equ
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Answer:

The work done by this force can be found via the following formula

W = \int{F(x)} \, dx = \int\limits^0_{-20} {(-kx)} \, dx = \frac{-kx^2}{2}\left \{ {{x=0} \atop {x=-20}} \right. = \frac{-60*(-20)^2}{2} \\W = -12000J

Explanation:

Alternatively, the work done by the object is equal to the elastic potantial energy done by the spring.

U = \frac{1}{2}kx_2^2 - \frac{1}{2}kx_1^2 =0 - \frac{1}{2}60(-20)^2 = -12000J

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