Knockout JEE Main April 2021 (One Month)
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Identify the pair whose dimensions are equal.
Option 1)
torque and work |
Option 2)
stress and energy |
Option 3)
force and stress |
Option 4)
force and work. |
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Torque and work have the same dimensions .
Using as we learnt in:
Work, Potential Energy, Kinetic Energy, Torque -
- wherein
Option 1)
torque and work
torque and work
Torque
Work
( Hence both are product of
and
and hence both has same dimension).
Option 2)
stress and energy
stress and energy
Stress =
and energy is product of force and displacement.
Hence Energy and stress have different dimension.
Option 3)
force and stress
force and stress
Stress =
Hence dimension of stress is different from force.
Option 4)
force and work.
force and work.
Work - Force
displacement
Hence dimension of force and work are different .