Question
Download Solution PDF440 N वजनाची मुलगी 20 सेकंदात 7 मीटर उंचीवरून एका दोरीवर चढते. मुलीने खर्च केलेली शक्ती किती आहे?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFसंकल्पना:
- शक्तीची व्याख्या काम करण्याचा दर म्हणून केली जाते.
- शक्तीचे हे एकक वॅट (W) आहे
- जर एखादे उपकरण (W) वेळ (t) मध्ये कार्य करत असेल, तर त्याची शक्ती (P) सूत्राद्वारे दर्शविली जाते,
- \(P = \frac Wt\)
- जेव्हा वस्तूवर कार्यरत असणारे बल वस्तूला त्याच्या दिशेने विस्थापित करते तेव्हा कार्याची व्याख्या केली जाते.
- W = F x s हे सूत्र वापरून आपण कार्य (W) मोजू शकतो
- जेथे, F हे प्रयुक्त केलेले बल आहे आणि s हे त्याच्या दिशेने असलेल्या बलामुळे होणारे विस्थापन आहे.
गणना:
दिलेल्याप्रमाणे, वजन, F = 440 N, उंची, s = 7 मीटर, वेळ, t = 20 s
कार्य, W = 440 x 7
आता, शक्ती \(P = \frac Wt \)
\(\Rightarrow P = \frac {440 \times 7}{20} \)
P = 154 W
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