• #### Class 8 Science Study Material

An Educational platform for Preparation and Practice Class 8. Kidsfront provide unique pattern of learning Science with free online comprehensive study material in the form of QUESTION & ANSWER for each Chapter of Science for Class 8. This study material help Class 8, Science students in learning every aspect of Friction . Students can understand Friction concept easily and consolidate their learning by doing Online Practice Tests on Science, Friction chapter repeatedly till they excel in Class 8, Friction . Free ONLINE PRACTICE TESTS on Class 8, Friction comprise of Hundreds of Questions on Friction , prepared by the highly professionals team. Every repeat test of Friction will have new set of questions and help students to prepare themselves for exams by doing unlimited Online Test exercise on Friction . Attempt ONLINE TEST on Class 8,Science, Friction in Academics section after completing this Friction Question Answer Exercise.

Unique pattern

• Topic wise: Friction preparation in the form of QUESTION & ANSWER.
• Evaluate preparation by doing ONLINE TEST of Class 8, Science, Friction .
• Review performance in PRACTICE TEST and do further learning on weak areas.
• Attempt repeat ONLINE TESTS of Science Friction till you excel.
• Evaluate your progress by doing ONLINE MOCK TEST of Class 8, Science, All TOPICS.

##### To reduce friction in some machines between the moving parts, the device used is

a) Solid cushions.
b) Air cushions.
c) Fibre glass.
d) Paper cushions.

##### Friction between the road and grooves of car tyres allows

a) Safe driving.
b) Unsafe driving.
c) Difficult driving.
d) Easy driving.

a) Time.
b) Money.
c) Energy.
d) Material.

##### To start to slide a heavy box across the floor is harder than to keep it sliding because

a) Static friction is greater than kinetic friction.
b) Kinetic friction is greater than the static friction.
c) Sliding friction is less than rolling friction.
d) It needs more force to overcome sliding friction.

##### An advantage of using rollers instead of sliding an object is that

a) Rollers are less expensive.
b) Rolling friction is less than sliding friction.
c) Rolling friction is more than sliding friction.
d) Rollers are easy to handle.

##### To increase the friction of a muddy ground, it is sprinkled with

a) Oil.
b) Sand and gravel.
c) Grease.
d) Talcum powder.

##### In absence of an external force, a moving object after sometime comes to a stop on its own due to

a) Its velocity.
b) Friction.
c) Magnetic force.
d) The smoothness of the surfaces.

##### The use of ball bearings between the hubs and the axles of bicycles is an example of

a) Static friction.
b) Sliding friction.
c) Rolling friction.
d) Fluid friction.

##### The force of friction increases if the two surfaces are

a) Pressed harder.
b) Pressed smoothly.
c) Left untouched.
d) Just touched.

##### If the force is applied along the downward direction, the friction acts

a) Upwards.
b) Downwards.
c) Right hand side.
d) Sideways.