Advertisements
Advertisements
प्रश्न
Answer the following in short.
Why do wrestlers rub powder on their hands before getting into the ring?
उत्तर
In order to prevent their hands from slipping over their opponent’s body. The powder increases friction.
APPEARS IN
संबंधित प्रश्न
Write true or false.
A force increases the mass of the body when applied on it.
Write true or false.
A wet oily road offers more friction than a dry rough road.
What effects can a force have on a moving body?
State the effect produced by a force in the following case:
The sling of a rubber catapult is stretched
Which offers more friction on a body: a glass surface or a wooden surface?
Answer the following in a word or two or in a sentence.
Which force is responsible for supporting the weight of a book placed on a table?
Solve the following numerical problem.
The forces acting on a wooden block are shown in the figure given alongside. Find the resultant of the forces and the direction of the resultant force.
Give a reason for the following.
Vehicles skid on muddy and wet roads. Suggest what type of tires can prevent skidding of vehicles?
Give a reason for the following.
Boats and ships have streamlined shapes?
Two balls of the same size but of different materials, rubber and iron are kept on the smooth floor of a moving train. The brakes are applied suddenly to stop the train. Will the balls start rolling? If so, in which direction? Will they move at the same speed? Give reasons for your answer.