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Test: Friction - 2 - UPSC MCQ


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10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Friction - 2

Test: Friction - 2 for UPSC 2025 is part of Science & Technology for UPSC CSE preparation. The Test: Friction - 2 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Friction - 2 MCQs are made for UPSC 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Friction - 2 below.
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Test: Friction - 2 - Question 1

What type of friction occurs when one body rolls over the surface of another body?

Detailed Solution for Test: Friction - 2 - Question 1
Rolling friction occurs when one body rolls over the surface of another body, reducing the resistance compared to sliding friction.
Test: Friction - 2 - Question 2

What do ball bearings replace in most machines to reduce friction?

Detailed Solution for Test: Friction - 2 - Question 2

Ball bearings are used in machines to replace sliding friction with a much lower form of friction. They achieve this by allowing parts to move smoothly over each other through rolling instead of sliding.Sliding friction occurs when two surfaces move over each other directly. Ball bearings reduce this by introducing rolling elements between surfaces.This change significantly decreases the amount of friction.

 

Test: Friction - 2 - Question 3

The substance which reduce friction are called

Detailed Solution for Test: Friction - 2 - Question 3

The substances which reduce friction are called lubricants. Lubricants include graphite, oils and greases. Lubricant stick with moving part to reduce friction.

Test: Friction - 2 - Question 4

Which substance is commonly sprinkled on a carrom board to reduce friction?

Detailed Solution for Test: Friction - 2 - Question 4

Powder is sprinkled on the surface of a carrom board to reduce friction, allowing smoother and faster movement of the striker and carrom men.

Test: Friction - 2 - Question 5

The frictional force exerted by fluids is also called _____________.

Detailed Solution for Test: Friction - 2 - Question 5

The frictional force exerted by fluids is also called as drag.This kinds of frictional force can be reduced by changing the shape of the moving body.

Test: Friction - 2 - Question 6
Why is it easier to pull luggage fitted with rollers?
Detailed Solution for Test: Friction - 2 - Question 6
Rollers reduce friction by converting sliding friction to rolling friction, making it easier to pull luggage.
Test: Friction - 2 - Question 7

What is the primary role of friction in the context of moving objects?

Detailed Solution for Test: Friction - 2 - Question 7

Friction always acts to oppose the relative motion between two surfaces in contact, slowing down moving objects.

Test: Friction - 2 - Question 8

Which of the following is used to measure the force of friction between two surfaces?

Detailed Solution for Test: Friction - 2 - Question 8

A spring balance is used to measure the force of friction by indicating the force required to start moving an object or keep it moving.

Test: Friction - 2 - Question 9

The treaded tyres of cars, trucks and bus

Detailed Solution for Test: Friction - 2 - Question 9

The treaded tyres of cars, trucks and bulldozers increase friction force between road and tyres and provide a better grip with the ground.
Friction is the resistance to motion of one object moving relative to another.
Friction is a resultant force not a fundamental one like the electromagnetic force.

Test: Friction - 2 - Question 10

The shape of fish is streamlined to ________.

Detailed Solution for Test: Friction - 2 - Question 10

The shape of fish is streamlined that help in decreasing fluid friction.The narrower part of streamlined shape offer less resistance due to friction.

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