Aspring has a spring stiffness constant, k, of 440 n/m. how much must the spring be stretched to store 25 j of potential energy?
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Ответ:
The spring is stretched by 33.7 cm.
Explanation:
It is given that,
Spring constant, k=440 N/m.
Energy stored in the stretched spring, E=25 J.
Now, Spring potential energy when it is stretched x meters is
Therefore,
The spring is stretched by 33.7 cm.
Hence, this is the required solution.
Ответ:
The correct answer is "1080 W".
Explanation:
Given:
Current,
I = 9.0 A
Potential difference,
V = 120 volt
As we know,
⇒
On substituting the values, we get
⇒
⇒