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rjkz [21]
3 years ago
13

If a spring constant of 128N/m is compressed by 0.18 m , how much potential energy is the spring?

Physics
1 answer:
Mademuasel [1]3 years ago
7 0

Answer:

2.1J

Explanation:

Given parameters:

Spring constant  = 128N/m

Compression  = 0.18m

Unknown:

Potential energy of the spring  = ?

Solution

The potential energy of the spring is the elastic potential energy within the spring.

 To solve this;

   Elastic potential energy  = \frac{1}{2}  k e²  

k is the spring constant

e is the compression

 Now;

     Elastic potential energy  =  \frac{1}{2} x 128 x 0.18²  = 2.1J

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Consider a block on frictionless ice. Starting from rest, the block travels a distance din
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<em>The distance is now 4d</em>

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<u>Mechanical Force</u>

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The acceleration can be calculated by solving for a:

\displaystyle a=\frac{F}{m}

Once we know the acceleration, we can calculate the distance traveled by the block as follows:

\displaystyle d = vo.t+\frac{at^2}{2}

If the block starts from rest, vo=0:

\displaystyle d = \frac{at^2}{2}

Substituting the value of the acceleration:

\displaystyle d = \frac{\frac{F}{m}t^2}{2}

Simplifying:

\displaystyle d = \frac{Ft^2}{2m}

When a force F'=4F is applied and assuming the mass is the same, the new acceleration is:

\displaystyle a'=\frac{4F}{m}

And the distance is now:

\displaystyle d' = \frac{4Ft^2}{2m}

Dividing d'/d:

\displaystyle \frac{d' }{d}=\frac{\frac{4Ft^2}{2m}}{\frac{Ft^2}{2m}}

Simplifying:

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3 0
3 years ago
wo fixed charges, A and B are located at x axis. A is at x = 0 m, B is at x = 4 m. QA = +4.0 μC and QB = -5.0 μC. Calculate the
lys-0071 [83]

Answer:

10250 N/C leftwards

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QA = 4 micro Coulomb

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3 years ago
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