Question
Download Solution PDFA boy of mass 50 Kg climbs 44 steps in 10 seconds. If the height of each ladder is 15 cm. Find its power. Given g = 10 ms–2
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is 330W.
Key Points
- Given,
- mass of body (m) = 50 kg
h = 44×15 = 660 cm = 6.60 m
t=10 s, g = 10 ms-2
Potential energy = mgh
= 50 × 10 × 6.60
= 3300 W - \(Power = {Work done \over time}\)
- \(= { 3300\over 10}\)
- 330W
- mass of body (m) = 50 kg
Additional Information
- Potential Energy:
- It is the energy possessed by a body by virtue of its position.
- PE of a body in the gravitational field of the earth is mgh.
- where m = mass, g = acceleration due to gravity, h = height of the body from the surface of the earth.
- When a body is falling downwards, then its potential energy goes on changing to kinetic energy.
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