मराठी

Complete the Following Sentences: - Physics

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प्रश्न

Complete the following sentences:

 1 H.P. = ........ W.

रिकाम्या जागा भरा

उत्तर

 1 H.P. = 746 W.

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पाठ 1: Force, Work, Energy and Power - Exercise 1.4 ii [पृष्ठ ३८]

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फ्रँक Physics - Part 2 [English] Class 10 ICSE
पाठ 1 Force, Work, Energy and Power
Exercise 1.4 ii | Q 33.5 | पृष्ठ ३८

संबंधित प्रश्‍न

Derive a relationship between S.I. and C.C.S. unit of work


A coolie does no work against the force of gravity while carrying a luggage on a road.


Power spent by a body depends on the time for which it does work.


Give reasons for the following A teacher moving around in the class is doing work but a child standing and reading a book is not doing any work.


A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:

The loss in potential energy of the body, 


What is the condition for a force to do work on a body?


What is the work done against gravity when a body is moved horizontally along a frictionless surface?


What is the SI unit of work?


What do you mean by a kilo joule?


No work is done by a man moving on a horizontal road while carrying a box on his head. Explain.


A machine raises a load of 750 N through a height of 16 m in 5s. calculate:
(i)    work done by machine,
(ii)    power at which the machine works.


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

What is meant by the principle of moments?

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).

A block of mass 30 kg is pulled up a slope, as shown in diagram with a constant speed, by applying a force of 200 N parallel to slope.
A and B are initial and final positions of block.

(i) Calculate the work done by force in moving the block from A to B.
(ii) Calculate P.E. gained by block. [g=10ms-2]


Mention whether work is done or not in the following activity.

S. No Activity Work done or not done
1. Pushing the door  
2. Holding a doll  
3. Sitting in a bus  
4. Pushing a wall  
5. Digging soil  

A is a push or a pull ______.


A force can cause an object to change its ______.


Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.

A donkey is carrying a load on its back.


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