Friction Worksheet-2

Friction Worksheet-2

 

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

A. rolling, static, sliding              B. rolling, sliding, static

C. static, sliding, rolling              D. sliding, static, rolling

 

  1. Kimy runs her toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be

A. Wet marble floor, dry marble floor, newspaper, towel.

B. Newspaper, towel, dry marble floor, wet marble floor.

C. towel, newspaper, dry marble floor, wet marble floor.

D. Wet marble floor, dry marble floor, towel, newspaper.

 

  1. Friction always

A. helps the motion                      B. oppose the motion

C. both of these                             D. none of these

 

  1. Friction is a

A. contact force                             B. non-contact force

C. magnetic force                         D. none of these

 

  1. Smooth surface has

A. less frictional force

B. more frictional force

C. sometimes less and sometime more force

D. all of these

 

  1. Substances which are called lubricants, they are used to

A. increase friction

B. decrease friction

C. increase or decrease friction

D. none of these

 

  1. Fluids are

A. Gases                                          B. Liquids

C. gases and liquids both            D. none of these

 

Answer Key:

  1. C

  2. A

  3. B

  4. A

  5. A

  6. B

  7. C