1:   With the use of ---- sliding friction changes into rolling friction.
Options:
  1. ball bearing
  2. electricity
  3. stones
  4. all the above

Answer: Option 1

Explanation:

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2:   Force of friction is the product of normal reaction and ----
Options:
  1. n
  2. v
  3. m
  4. none of these

Answer: Option 4

Explanation:

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3:   All acceleration and rotational frames of reference are --------------frame of reference.
Options:
  1. initial
  2. non initial
  3. both the above
  4. none of these

Answer: Option 2

Explanation:

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4:   Coefficient of kinetic friction is ----than the coefficient of static friction.
Options:
  1. equal
  2. greater
  3. less
  4. none of these

Answer: Option 3

Explanation:

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5:   Friction is a ----------force
Options:
  1. conservative
  2. non conservative
  3. both the above
  4. none of these

Answer: Option 2

Explanation:

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6:   The value of limiting friction is ----- proportional to normal reaction.
Options:
  1. directly
  2. inversely
  3. both the above
  4. none of these

Answer: Option 1

Explanation:

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7:   Force of friction acts ---to contact surface.
Options:
  1. perpendicular
  2. parallel
  3. opposite
  4. none of these

Answer: Option 2

Explanation:

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8:   Newton's law of motion are obeyed in -------frame of reference
Options:
  1. inertial
  2. working
  3. momentum
  4. none of these

Answer: Option 1

Explanation:

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9:   Rolling friction is ------- than sliding friction
Options:
  1. smaller
  2. greater
  3. equal
  4. none of these

Answer: Option 1

Explanation:

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10:   The unit of coefficient of friction is
Options:
  1. m
  2. m/s
  3. m/s2
  4. no unit

Answer: Option 4

Explanation:

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