Test Details

Friction

Dec 05, 10:10 AM

120 minutes

Dec 15, 11:00 AM

50.0 marks

MCQ

50 questions

Mastermind Institute

Classes for IX TO XII,BSc,MSc,Polytechinic,NEET,BHU,JEE,NTSE,OLYMPIAD etc

Class Details

Maths

Science

English

Class 8 CBSE

Maths

Science

English

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Question Text

Question 3 :
When two bodies are made extra smooth the force of friction ..............

Question 4 :
 Fill in the blank.Dynamic Fluid Friction is ______ the sliding friction of solids.

Question 7 :
The surface of a table is smoother as compared to that of a road. This is due to:

Question 8 :
A ball is rolled on four surfaces: a) marble floor,   b) in sand,   c) on cloth,  d) on wood. The force of friction acting on the ball on these different surfaces in descending order will be:

Question 11 :
The force of friction is ....................... the normal reaction between the surfaces.

Question 17 :
Alida runs her toy car on dry marble floor, wetmarble floor, newspaper and towel spread on thefloor. The force of friction acting on the car ondifferent surfaces in increasing order will be

Question 18 :
You are marooned on a frictionless horizontal surface and cannot exert any horizontal force by pushing against the surface. How can you get off?

Question 21 :
The mover pushed his cart on tile floor and it went fast and easy. When he pushed his cart on carpet it was harder because there is more friction on carpet. What should he do to move his cart on carpet with equal speed?

Question 22 :
Arrange the level of difficulty of walking on the following surfaces in increasing order. a) On wooden floor      b) On concrete floor c) On wet marble         d) On dry marble

Question 24 :
Two boxes A and B weighing 5 kg and 10 kg respectively, have to be pushed along the same slope. In which case will the frictional force be more?

Question 26 :
Which of the following material is likely to have least friction?

Question 29 :
Friction arises due to the interlocking of hills and .................. present in a body.

Question 32 :
Driving a car on a highway with windows open reduce the speed. This is due to:

Question 33 :
Which of the following is easier to hold with a greasy palm?

Question 34 :
When a coin and a feather are dropped simultaneously from the same height, the coin strikes the ground first. This is because of:

Question 44 :
Assertion: On polishing the surface the friction decreases upto certain limit but increases beyond that Reason: On polishing the surface, the irregularities are cut off but beyond a certain limit the surface molecules exert strong attractive forces on each other.

Question 45 :
Assertion: Horse has to pull a cart harder during the first few steps of his motion. Reason: The first few steps are always difficult.

Question 47 :
Fill in the blank. Water offers _______ fluid friction as compared to honey. 

Question 48 :
To move at same speed, a car with flat face and another with streamlined body, will require different amount of force from the engine. The engine of the streamline bodied car will:

Question 49 :
_______ helps in writing with a pen or pencil on a paper.

Question 50 :
A ball moving on a table top eventually stops. What isthe reason ?

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