Friction Online Test

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Friction

Description: practice questions on friction
Number of Questions: 15
Created by: Vinaya Modi
Tags: FRICTION Friction, Factors Affecting Friction. Friction Fluid Friction.

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Which of the following is a solid lubricant?

Sand
Silt
Oil
Grease
Graphite

In which of the following cases is the maximum friction observed?

A ball hits another ball rolling across the billiards' table.
A boy dragging a mat on which another boy is seated.
Holding a greasy tumbler.
Playing carrom on a board that was sprinkled with powder.
A boy doing roller skating.

A huge stone has fallen on to a mountain road. A man is clearing out this stone. What is measured as the force required to overcome the friction of this huge stone when he is trying to move it out of the road?

Sliding friction
Drag
Static friction
Amplitude
Rolling friction

Rolling friction is lesser than sliding friction. Which of the following correctly represents this phenomenon?

A boy pushing a huge stone
Tug of war between two teams
Ball bearing being used in cycles and fans
A table being pulled
A match stick being lit by striking it

A badminton player and an athlete go to a footwear shop. The former selects grooved shoes while the latter selects spiked shoes. What do you think about their selections?

It is the latest fashion.
It helps to win matches.
For giving better blood circulation in their feet.
To have better grip on the floor.
To make them look taller.

In which of the following cases is more friction needed?

Spilling soapy water on a smooth granite floor in the kitchen
Creaking hinge of a door
Between machine parts with less grease
Carroms being struck on a carrom board
An aeroplane taking off

Which of the following is not a negative effect of friction?

A child is able to write with a pencil.
Worn out soles in an old shoe
Wearing out of tyres of vehicles
Ball bearing in a machine wearing out
Machine working for a long time producing too much heat

What term is used for frictional force exerted by air in the atmosphere when an aircraft takes off?

Sliding friction
Rolling friction
Lubrication
Drag
Static friction

Which of the following is not an example for streamlined shape?

Fish
Tractor
Aeroplane
Bird
Ship

A boy sees a meteorite burning out in the sky. He asks his father about it. His father replies that it happens due to

wind
gravity
friction against air
rolling friction
minerals on the meteorite

How does an aeroplane design to reduce fluid friction?

Powerful engines
Streamlined shape
Use of aviation fuel in it
By reducing the number of passengers in it
Filling only half the capacity of its fuel tank

________ is the special shape of a body due to which it experiences the least fluid friction.

Lubrication
Rolling friction
Streamlining
Wear and tear
Sliding friction

Friction is caused by the _______ on the two surfaces in contact.

smoothness
inclination
height
irregularities
width

Which of the following statements is incorrect?

Friction is a necessary evil.
Friction cannot be reduced.
Static friction comes into play when we try to move an object at rest.
Rolling friction is always less than sliding friction.
Friction is caused due to interlocking of irregularities on the two surfaces in contact with each other.

A girl was facing a difficulty in removing the bangles she wore on her hands. A suggestion was given to put soap solution on her hands and then try to remove the bangles. This trick worked and she removed the bangles more easily. This was because

soap solution reduced friction
soap solution increased the beauty of the bangles
hand became a bit leaner
heat was produced
her skin became harder

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