![]() It helps us to walk comfortably on the floor.It allows us to grip and catch any object.Some points are given below which show that friction is both a friend and a foe: Give examples to show that friction is both a friend and a foe. So it is somewhat easier to move an object already in motion than to get it started. The sliding friction is less than static friction because the sliding object get less time to interlock into the contact points on the floor. So Seema will have to apply a larger force.Įxplain why sliding friction is less than static friction. Who will have to apply a larger force and why?Ī heavy object produces more friction as it is pressed hard against the opposite surface. Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. So the shoes with spikes do not slip while the sportsmen run and play. Sportsmen use shoes with spikes to increase the friction between shoes and the surface. We may slip on the floor.Įxplain why sportsmen use shoes with spikes. Therefore it is difficult to walk on a soapy floor. This makes the floor slippery and the foot cannot make a proper grip on the floor. The layer of soap makes the floor smooth due to which the friction is reduced. Would it make it easier or more difficult for you to walk on the floor? Why? You spill a bucket of soapy water on a marble floor accidentally. Show the direction of frictional force acting on it.įrictional force will act upward, i.e., the direction opposite to that of sliding book. Suppose your writing desk is tilted a little. (d) wet marble floor, dry marble floor, towel, newspaper. (c) towel, newspaper, dry marble floor, wet marble floor. (b) newspaper, towel, dry marble floor, wet marble floor. (a) wet marble floor, dry marble floor, newspaper and towel. The force of friction acting on the car on different surfaces in increasing order will be Choose the correct arrangement.Īlida runs her toy car on a dry marble floor, wet marble floor, newspaper and towel spread on the floor. ![]() (b) smoothness (or irregularities or nature)įour children were asked to arrange forces due to rolling, static and sliding frictions in decreasing order. (e) Sliding friction is _ than the static friction. (d) The sprinkling of powder on the carrom board _ friction. (b) Friction depends on the _ of surfaces. (a) Friction opposes the _ between the surfaces in contact with each other. Topics and Sub Topics in Class 8 Science Chapter 12 Friction: Section Nameįriction Class 8 Science NCERT Textbook Questions ![]() NCERT Solutions for Class 8 Science Chapter 12 Friction Lakhmir Singh Science Class 8 Solutions.PS Verma and VK Agarwal Biology Class 9 Solutions.NCERT Solutions for Class 9 Foundation of IT.NCERT Solutions for Class 9 Social Science.NCERT Solutions for Class 10 Foundation of Information Technology.NCERT Solutions For Class 10 Hindi Kritika.NCERT Solutions For Class 10 Hindi Kshitiz.NCERT Solutions For Class 10 Hindi Sparsh.NCERT Solutions For Class 10 Hindi Sanchayan.NCERT Solutions for Class 10 Social Science.NCERT Solutions for Class 11 Indian Economic Development.NCERT Solutions for Class 11 Political Science.NCERT Solutions for Class 11 Psychology.NCERT Solutions for Class 11 Entrepreneurship.NCERT Solutions for Class 11 Accountancy.NCERT Solutions for Class 11 Business Studies.NCERT Solutions for Class 11 Computer Science (Python).NCERT Solutions for Class 12 Psychology.NCERT Solutions for Class 12 Political Science.NCERT Solutions for Class 12 Entrepreneurship.NCERT Solutions for Class 12 Macro Economics.NCERT Solutions for Class 12 Micro Economics. ![]() NCERT Solutions for Class 12 Accountancy.NCERT Solutions for Class 12 Business Studies.NCERT Solutions for Class 12 Computer Science (C++).NCERT Solutions for Class 12 Computer Science (Python).RD Sharma Class 11 Solutions Free PDF Download. ![]()
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