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A spanner (or wrench) has a long handle. Why? - Physics

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प्रश्न

A spanner (or wrench) has a long handle. Why?

एका वाक्यात उत्तर
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उत्तर

The long handle of the spanner creates a greater turning moment. The handles' ends are used with less force. 

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Force - EXERCISE - 1 (A) [पृष्ठ १०]

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सेलिना Physics [English] Class 10 ICSE
पाठ 1 Force
EXERCISE - 1 (A) | Q 13. | पृष्ठ १०

संबंधित प्रश्‍न

Match the column 

Column A  Column B
(a) Camel (1) broad and deep foundation
(b) Truck  (2) broad feet 
(c) Knife (3) six or eight tyres 
(d) High building (4) sharp cutting edge
(e) Thrust (5) atm
(f) Moment of force  (6) N
(g) Atmospheric pressure  (7) N m

Is moment of force a scalar or a vector?


What do you understand by the clockwise and anticlockwise moment of force? When is it taken positive?


The stone of hand flour grinder is provided with a handle near its rim. Give reason.


A wheel of diameter 2 m is shown in the figure with the axle at O. A force F = 2 N is applied at B in the direction shown in the figure. Calculate the moment of force about

  1. the centre O, and
  2. the point A.


A uniform metre rule of weight 10gf is pivoted at its 0 mark.

What moment of force depresses the rule?


Classify the following amongst contact and non-contact forces.
magnetic force


Calculate the resultant moment of forces about O and state its direction in fig. 


A person standing in front of a cliff fires a gun and hears its echo after 3 s. If the speed of sound in air is 336 ms−1.

  1. Calculate the distance of the person from the cliff.
  2. After moving a certain distance from the cliff, he fires the gun again, and this time the echo is heard 1.5 s later than the first. Calculate the distance that the person moved.

The diagram in Fig shows two forces F1 = 5 N and F2 = 3 N acting at points A and B respectively of a rod pivoted at a point O, such that OA = 2 m and OB = 4 m.

Calculate:

  1. the moment of force F1 about O.
  2. the moment of force F2 about O.
  3. total moment of the two forces about O.

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