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

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

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Strength of Materials
The weight of a body is due to

force of attraction experienced by par-ticles
gravitational force of attraction towards the centre of the earth.
centripetal force of 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 any smooth surface with which the body is in contact
All of the listed here
reaction at a point or an axis, fixed in space, around which a body is con-strained to turn
reaction of a rough surface of a body which rolls on it without slipping

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