Question 1

Tyres are treaded to

Accepted Answer

A) To look good 
B) Increase friction 
C) To increase its longivity 
D) To increase weight of the tyre 
A) To look good 
B) Increase friction 
C) To increase its longivity 
D) To increase weight of the tyre B

Question 2

The frictional force exerted by fluids is also called ______

Accepted Answer

A) drug 
B) drag 
C) drop 
D) drown 
A) drug 
B) drag 
C) drop 
D) drown B

Question 3

Sliding friction is _________ than / to rolling friction

Accepted Answer

A) smaller 
B) greater 
C) equal 
D) None of the above 
A) smaller 
B) greater 
C) equal 
D) None of the above A

Question 4

A boat or an aeroplane has a pointed or tapering front / head. Why?

Accepted Answer

A) To increase the friction of fluid 
B) To reduce the friction of fluid 
C) To look good 
D) For no reason 
A) To increase the friction of fluid 
B) To reduce the friction of fluid 
C) To look good 
D) For no reason

Question 5

A matchstick struck on a matchbox catches fire easily because

Accepted Answer

A) Friction may cause fire 
B) Of chemical reaction 
C) Force heated the match stick 
D) None of the above 
A) Friction may cause fire 
B) Of chemical reaction 
C) Force heated the match stick 
D) None of the above

Question 6

Four children were asked to arrange forces due to rolling, static and sliding frictions in a increasing order. Their arrangements are given below. Choose the correct arrangement.

Accepted Answer

A) Rolling, Static, Sliding 
B) Static, Rolling, Sliding 
C) Rolling, sliding, static 
D) Sliding, Static, Rolling 
A) Rolling, Static, Sliding 
B) Static, Rolling, Sliding 
C) Rolling, sliding, static 
D) Sliding, Static, Rolling

Question 7

Lubricants are substances which

Accepted Answer

A) Increases friction 
B) Are used to light fire 
C) Reduces friction 
D) Are used to put off fire 
A) Increases friction 
B) Are used to light fire 
C) Reduces friction 
D) Are used to put off fire

Question 8

It is difficult to walk on any oily floor because

Accepted Answer

A) Floor gets spoiled 
B) There is more resistance 
C) Force of friction is high 
D) Force of friction is very less 
A) Floor gets spoiled 
B) There is more resistance 
C) Force of friction is high 
D) Force of friction is very less

Question 9

The sole of the shoes becomes plain after wearing it for several months. The reason is

Accepted Answer

A) Wearing out due to friction 
B) Wearing out due to no friction 
C) Sole is of bad quality 
D) None of the above 
A) Wearing out due to friction 
B) Wearing out due to no friction 
C) Sole is of bad quality 
D) None of the above

Question 10

Spring balance is a device used for measuring the _____________ acting on an object.

Accepted Answer

A) mass 
B) pressure 
C) force 
D) None of the above 
A) mass 
B) pressure 
C) force 
D) None of the above

Exam 1: Friction and Its Applications