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प्रश्न
In the following figure, a boy is shown pushing the box from right to left. The force of friction will act on the box
विकल्प
from right to left (←)
from left to right (→)
vertically downwards (↓)
vertically upwards (↑)
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उत्तर
from left to right (→)
Explanation:
The force of friction will be from left to right (→) because the friction force always acts in opposite direction to the motion.
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संबंधित प्रश्न
Give examples to show that friction is both a friend and a foe.
Fill in the blank.
We use ball bearings to .................. the friction.
Give an example to illustrate the existence of the force of friction.
State two factors which directly affect the force of friction.
A body needs a force F1 just to start moving on a surface, a force F2 to continue its motion and a force F3 to roll on the surface. What is
- the static friction
- sliding friction and
- rolling friction? State whether F2 is equal, less than or greater than (1) F1 and (2) F3.
Fill in the blank.
.................... is the SI unit of force.
State if the following statement is true or false. Correct the statement if it is false.
If two forces acting in opposite directions on a body arc of equal magnitude, then the body will not move.
Answer the following in a word or two or in a sentence.
Which type of force acts on a string pulled from both ends?
Answer the following in short.
Define force. Write its SI unit.
Answer the following in detail.
What are the various effects of force? State one example of each.
Fill in the blank.
More the roughness of a surface, greater is the ........................
Fill in the blank.
Sliding friction and rolling friction are types of .................. friction.
Tick the most appropriate answer
Friction always
Fill in the blank
Rolling friction is ............. than sliding friction.
Answer the following in a word or two or in a sentence.
Why is difficult for a pen to leave a mark on a highly smooth plastic sheet?
Answer the following in short.
List the various states of matter that offer frictional force?
Friction depends on the ______ of two surfaces in contact.
Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.
