Friction — Set 6
Physics · घर्षण · Questions 51–60 of 60
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1
Which of the following helps to reduce drag on a bird flying through the air?
2
The force of friction does NOT depend on which of the following?
3
Why is sand often spread on tracks covered with snow?
4
What happens to the friction between two surfaces if they are polished excessively?
5
Which of the following is an example of sliding friction?
6
The 'coefficient of friction' is usually represented by which Greek letter?
7
Why do carrom players use powder on the board?
8
Which of these is a way to increase friction when it is needed?
9
The resistance offered by a gas or a liquid to the motion of an object is called _____.?
10
When we rub our hands together, they become warm due to _____.?