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Sloan [31]
3 years ago
13

A spring has a spring constant of 113 N/m . How much elastic potential energy is stored in the spring when it is compressed by 0

.03 m?A:0.23 j B:0.022 j C:0.051 j D: 1.70 j
Physics
2 answers:
andrezito [222]3 years ago
7 0

Answer:

= 1.7 Joules

Explanation:

The electrical potential energy is given by;

P.E = 1/2 ke²

Where, k is the spring constant, e is the extension

Therefore;

Electrical potential energy = 1/2 × 113 N/m × 0.03 m

                                           =  1.695 Joules

                                           <u>= 1.7 J</u>

Alexus [3.1K]3 years ago
4 0

Answer:

0.051 J

Explanation:

K = 113 N/m

y = 0.03 m

The elastic potential energy of the system is given by

U = 1/2 K y^2 = 0.5 x 113 x 0.03 x 0.03 = 0.051 J

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3 years ago
You place a light bulb 8 cm in front of a concave mirror. You then move a sheet of paper back and forth in front of the mirror.
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sorry - late reply...just stumbled across tis...hope u can still use it :)


By the mirror equation: 1/di + 1/do = 1/f

<span>
</span>

<span>where di = distance to image = +12cm (+ for real image)</span>


and do = distance to object = +8cm


Substitute and solve for f, the focal length

<span><span>
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3 years ago
A body is projected from the ground at an angle of 30° with the horizontal at an initial speed of 128 ft/s. Ignoring air frictio
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