Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
It is because when the object is at rest, static friction occurs. The static friction is maximum when the applied force is just short of the force required to start motion between the two bodies in contact. Once the object starts moving, friction (resistance) we feel decreases.
APPEARS IN
संबंधित प्रश्न
Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
Answer the following.
What do you understand by a force?
Answer the following in a word or two or in a sentence.
Why does a rolling ball stop after moving some distance?
Answer the following in short.
What do you understand by normal force?
Fill in the blank.
Sliding friction and rolling friction are types of .................. friction.
Fill in the blank
Rolling friction is ............. than sliding friction.
Fill in the blank.
Bicycles use ...................... to reduce friction between the pedals and the crank
State if the following statement is true or false. Correct the statement if it is false.
Friction has no relation with our walking or running.
Assertion: There is a danger of a vehicle skidding on a wet road.
Reason: The tires of the vehicle lose their grip on the road due to an increase in friction due to the presence of water on the road.
Complete the analogy.
Knot in a thread : ______ friction :: Ball bearing : ______ friction.
