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Yogita Ingle 6 years, 8 months ago
Work is said to be done when a force applied to an object moves that object. The SI unit of work is the joule (J) . We can calculate work by multiplying the force by the movement of the object. W = F × d
Positive Work
- If a force displaces the object in its direction, then the work done is positive
So, W=Fd
The example of this kind of work done is motion of ball falling towards ground where displacement of ball is in the direction of force of gravity.
Negative work
- If the force and the displacement are in opposite directions, then the work is said to be negative.
For example if a ball is thrown in upwards direction, its displacement would be in upwards direction but the force due to earth’s gravity is in the downward direction.
Posted by Clash With Sanjeev 6 years, 8 months ago
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Yogita Ingle 6 years, 8 months ago
When the roads (dr tracks) are covered with snow then there is considerable reduction of frictional force between the tyres of the vehicle and the road (or between the track and the wheels of the train) which leads to the skidding of the vehicles. Thus, driving is not safe. When sand is thrown on the snow covered tracks or roads then the force of friction increases, so safe driving is possible .
Posted by Súfyāñ Khan 6 years, 8 months ago
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Yogita Ingle 6 years, 8 months ago
Merits:
- Ease of formation: It can be started with minimum of 10 members. Registration is also easy as it requires very few legal formalities.
- Limited liability: The liability of members is limited to the extent of their capital contribution.
- Stable existence: Due to registration it is a separate legal entity and is not affected by death, lunacy or insolvency of any of its members.
- Economy in operations: There is economy in operation due to elimination of middle man and voluntary services provided by its members.
- Government support: Government provides support by giving loans at lower interest rates, subsidies and by charging less taxes.
- Social utility: It promotes personal liberty, social justice and mutual cooperation. They help to prevent concentration of economic power in a few hands.
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Meghna Thapar 5 years, 6 months ago
Mating with more than one pollen donor, or polyandry, is common in land plants. In flowering plants, polyandry occurs when the pollen from different potential sires is distributed among the fruits of a single individual, or when pollen from more than one donor is deposited on the same stigma. Synandrous means having stamen fused along both their filaments and anthers. (botany, rare) Having stamens fused together in any way.
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CF / CP release refers to two different ways of releasing the club. 'CF' and 'CP' are implying centrifugal and centripetal force which are hence thought to be a characteristic element in the release action of the club.
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Yogita Ingle 6 years, 8 months ago
Raindrops take up the spherical shape due to the surface tension of water which is caused due to the tendency of water molecules to stick together. The spherical shape is having the least possible surface area due to which it can resist any of the external force in the atmosphere.
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