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प्रश्न
While playing tug of war, Preeti felt that the rope was slipping through her hands. Suggest a way out for her to prevent this.
उत्तर
To prevent slipping of the rope from hands, Preeti has to make her hands somewhat non-smooth, so she can rub her hands by introducing the sand between them.
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संबंधित प्रश्न
Sliding friction is ______ than the static friction.
Four children were asked to arrange forces due to rolling, static and sliding frictions in a decreasing order. Their arrangements are given below. Choose the correct arrangement.
Explain why sliding friction is less than static friction.
Define friction. Give two examples of the utility of friction in day-to-day life.
Mention any three ways of minimizing friction.
Give the different types of friction and explain each with an example.
Explain why the surface of mortar and pestle (silbatta) used for grinding is etched again after prolonged use.
A marble is allowed to roll down an inclined plane from a fixed height. At the foot of the inclined plane, it moves on a horizontal surface (a) covered with silk cloth (b) covered with a layer of sand and (c) covered with a glass sheet. On which surface, will the marble move the shortest distance. Give reason for your answer.
A father and son pushed their car to bring it to the side of road as it had stalled in the middle of the road. They experienced that although they had to push with all their might initially to move the car, the push required to keep the car rolling was smaller, once the car started rolling. Explain.
While travelling on a rickshaw, you might have experienced that if the seat cover is very smooth, you tend to slip when brakes are applied suddenly. Explain.
