. Static coefficient of friction is greater than the kinetic coefficient of friction. a) True b) False
TRUE
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10
Which of the following is the dimension of coefficient of friction? a. [M0 L0 T0] b. [M L2T] c. [M2 L T] d. [M L2 T-2]
[M0 L0 T0]
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10
____ is known as the motion that would take place under the applied force if friction were absent. a) Impending motion b) Constrained motion c) Unconstrained motion d) Linear motion
Impending motion
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10
What are the types of kinetic friction? a) Sliding friction, rolling friction and adhesive friction b) Sliding friction and rolling friction c) Rolling friction and adhesive friction d) Sliding friction and adhesive friction
b) Sliding friction and rolling friction
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10
If the normal force is doubled, then coefficient of friction is
HALVED
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10
Direction of frictional force between wheel of the car and road is ---------------a.Upward b.Forward c.Backward d.Downward