Advertisements
Advertisements
Question
Explain why sportsmen use shoes with spikes.
Advertisements
Solution
Sportsmen wear shoes with spikes because they give them a better grip while running. The force of friction between the shoes and the ground increases with the help of spikes.
RELATED QUESTIONS
Friction opposes the ______ between the surfaces in contact with each other.
Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of frictional force acting on it.
When a glass rod is rubbed with a piece of silk cloth the rod ______.
A charged glass rod attracts a charged plastic straw.
Select the correct alternative.
Friction is reduced by
The eraser gets smaller and smaller as you use it more and more. Explain the reason.
List three ways of reducing friction.
Arrange the following in descending order:
- static friction
- sliding friction and
- rolling friction?
Answer the following in a word or two or in a sentence.
Why does a rolling ball stop after moving some distance?
Fill in the blank.
The force of friction acting between two bodies in contact while at rest is known as ................ friction.
Tick the most appropriate answer.
Friction is offered by
Tick the most appropriate answer.
If you pour some oil onto a floor, the friction would
Fill in the blank.
Friction is a type of .................
Answer the following in short.
When you push something heavy, the resistance you feel decreases as soon as the object starts moving. Explain the reason.
Answer the following in short.
Define rolling friction and give an example where rolling. friction comes into play.
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
Answer the following in detail.
Define friction and explain how it is useful to us.
How do you feel when you touch a nail immediately after it is hammered into a wooden plank? Why?
Explain how friction can be minimized.
In the following figure, a boy is shown pushing the box from right to left. The force of friction will act on the box
