Advertisements
Advertisements
प्रश्न
It is difficult to open an inkpot with greasy or oily hands. Explain.
Advertisements
उत्तर
When the hands are oily, then the oil acts as a lubricant and reduces the friction.
As the friction force is less, it is difficult to get a grip of the inkpot and it becomes difficult to open it.
APPEARS IN
संबंधित प्रश्न
Write true or false.
A force can change the direction of motion of a moving body.
Fill in the blank.
Lubricants are used to ..................... friction.
Give one example of stops motion to indicate that the application of a force?
Give one example of changes the direction of motion to indicate that the application of a force?
State the effect produced by a force in the following case:
A spring is compressed.
Which offers more friction on a body: a glass surface or a wooden surface?
Answer the following.
Define weight.
Answer the following in short.
Why do wrestlers rub powder on their hands before getting into the ring?
What is momentum? Write its SI unit. Interpret force in terms of momentum. Represent the following graphically
(a) momentum versus velocity when mass is fixed.
(b) momentum versus mass when velocity is constant.
Mention the factors on that the effect of a force depends.
