Single correct option
Which one of the following physical quantities has the same dimensions as work?
- A. Power
- B. Torque
- C. Momentum
- D. Pressure
Show answer and solution
Answer: (B) Torque
Work is force times displacement, giving ML^2T^-2. Torque is force times perpendicular distance, which has exactly the same dimensions even though it is a different physical quantity. Power has an extra T^-1, momentum is MLT^-1 and pressure is ML^-1T^-2, so none of the others match.
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