Friction

 Rainbow 🌈 Mental Exercise, daily activity 

1. Friction always  

 A) helps motion
 B) opposes motion
 C) Both of these
 D) None of these

ANSWER= (B) opposes the motion 
Explain:- Friction always opposes motion. 

 

2. The shape of the airplane is like a

 A) bus
 B) fish
 C) dog
 D) all of above

ANSWER= (B) fish
Explain:- The shape of the airplane is like a fish

 

3.Friction is a __________

 A) magnetic force
 B) contact force
 C) non contact force
 D) None of these

ANSWER= (B) contact force
Explain:- Friction is a contact force

 

4.Fluids are____

 A) liquids 
 B) gases
 C) Both 
 D) none

ANSWER= (A) Both
Explain:- Fluids are both liquids and gases

 

5.On what force of friction depends?

 A) smoothness of a surface 
 B) Roughness of a surface 
 C) Inclination 
 D) all of above

ANSWER= (D)  
Explain:- Force of friction depends upon smoothness, Roughness, Inclination of a surface. . 

 

6.Intermolecular space is the greatest in

 A) solids
 B) liquids
 C) gases
 D) liquids state and gases

ANSWER= (C) gases
Explain:-Intermolecular space is the greatest in gases

 

Friction is a /an_______

 A) foe
 B) evil
 C) both
 D) none

ANSWER= (A) both
Explain:- Friction is both foe and evil.