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सी.आई.एस.सी.ई.अंग्रेजी माध्यम ICSE Class 10
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पाठ्यक्रम

What is Meant by Power?

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प्रश्न

What is meant by power?
एक पंक्ति में उत्तर
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उत्तर

The rate of doing work is called power.
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Concept of Work
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
Q 14
अध्याय 1: Force, Work, Energy and Power - Exercise 1.5 ii [पृष्ठ ५४]

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फ्रैंक Physics Part 2 [English] Class 10 ICSE
अध्याय 1 Force, Work, Energy and Power
Exercise 1.5 ii | Q 14 | पृष्ठ ५४

संबंधित प्रश्न

A man lifts a mass of 20 kg to a height of 2.5 m. Assuming that the force of gravity on 1 kg mass is 10 N, find the work done by the man.


MULTIPLE CHOICE TYPE

In an electric cell which in use, the change in energy is from:


Nm is the unit of .......


Can work done be zero even if force acts on the body?


Define kinetic energy.

The K.E. of a body is 5 J. What will be its K.E. when its speed is doubled?

A body is pivoted at a point. A force of 10 N is applied at a distance of 30 cm from the pivot. Find the moment of force about the pivot.

A boy pulls a box up to 10 m with a force of 5 kgf. Calculate the work done by him.


A lead bullet moving at 70 ms-1 is brought to rest on hitting a target. If 80% of its energy is converted into heat energy, find the rise in temperature (Sp. Heat cap. Of lead is 140 J/kgK).

(i) A 200g ball is thrown vertically upward with an initial velocity of 30 ms-1. Draw a velocity-time graph for the motion of ball.
(ii) How long will the ball take to reach the highest point?
(iii) What will be the kinetic energy of ball, when it returns to the starting point, neglecting the air resistance?
(iv) What will be the potential energy of ball at highest point?


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