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

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

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Strength of Materials
The weight of a body is due to

centripetal force of earth
force of attraction experienced by par-ticles
gravitational force of attraction towards the centre of the earth.
gravitational pull exerted by the earth

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Strength of Materials
In the equation of virtual work, following force is neglected

reaction of a rough surface of a body which rolls on it without slipping
reaction at a point or an axis, fixed in space, around which a body is con-strained to turn
reaction of any smooth surface with which the body is in contact
All of the listed here

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