मराठी

Explain why sportsmen use shoes with spikes.

Advertisements
Advertisements

प्रश्न

Explain why sportsmen use shoes with spikes.

स्पष्ट करा
Advertisements

उत्तर

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.

shaalaa.com
Force of Friction
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 9: Friction - Exercises [पृष्ठ १२१]

APPEARS IN

एनसीईआरटी Science [English] Class 8
पाठ 9 Friction
Exercises | Q 6. | पृष्ठ १२१

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?


A charged glass rod attracts a charged plastic straw.


Give an example to illustrate the existence of the force of friction.


When you apply brakes, the bicycle stops and the rim of the wheel becomes hot? Explain the reason.


List three ways of reducing friction.


Define rolling 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

  1. the static friction
  2. sliding friction and
  3. rolling friction? State whether F2 is equal, less than or greater than (1) F1 and (2) F3.

Answer the following in detail.

What are the various effects of force? State one example of each.


Fill in the blank.

Weight remaining the same, friction is independent of ............. of surface in contact.


Tick the most appropriate answer.

Force of friction comes into play when a/an


Tick the most appropriate answer

Friction always


Tick the most appropriate answer.

Friction for an object can be reduced by


State if the following statement is true or false. Correct the statement if it is false.

Friction is offered by all the three states of matter.


Answer the following in short.

How can sliding friction be changed into rolling friction easily?


Answer the following in detail.

Write the characteristics of the force of friction?


Complete the analogy.

Knot in a thread : _____ friction : : Ball bearing : _____ friction


Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play


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.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×