Physics
Frictional force acts in

The opposite direction of the motion
Upward direction
The same direction as the motion
All the directions

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Physics
Scalar Quantities are

Physical quantities which have magnitude only and no direction
Physical quantities which have no magnitude only and only direction
Physical quantities which have magnitude only and direction
Physical quantities which have no magnitude and no direction

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Physics
Acceleration is

Inversely proportional to mass
Inversely proportional to force
Directly proportional to mass
Directly proportional to force

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