Strength of Materials
Which of the following do not have identical dimensions?

Momentum and impulse
Torque and work
Moment of a force and angular momentum
Torque and energy

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Strength of Materials
Kinetic friction is the

Ratio of limiting friction and normal reaction
The friction force acting when the body is just about to move
The friction force acting when the body is in motion
Tangent of angle between normal reaction and the resultant of normal reaction and the limiting friction

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Strength of Materials
Coefficient of friction is the

angle between normal reaction and the resultant of normal reaction and the limiting friction
the friction force acting when the body is in motion
ratio of limiting friction and normal reaction
the friction force acting when the body is just about to move

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