Class VIII

Which friction of the following is the highest ? 
  1. Sliding friction 
  2. Rolling friction 
  3. Static friction 
  4. None of these 
Friction is a _ . 
  1. Type of contact force 
  2. Type of non-contact force 
  3. Type of pressure 
  4. Form of heat 
Friction is a /an
  1. Evil
  2. Foe
  3. Both (a) and (b)
  4. None
An object is at rest on a floor, a force is applied to move that object . Which friction force will come into an action at this moment ? 
  1. Sliding Friction 
  2. Static Friction 
  3. Rolling Friction 
  4. Fluid Friction 
Rougher Surface have ... 
  1. No friction 
  2. Less friction 
  3. Higher friction 
  4. Same level of friction . 
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