The work done by a force acting on an object is equal to the amount of force multiplied by the distance travelled in the direction of the force. Which of the following is not a unit of work?
A. kgm/sec2
B. kgm2/sec2
C. Newton meter
D. Joule
Answer: Option A
This Question Belongs to Physics GK Chapter Wise >> Unit And Measurement
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Related Questions on Unit and Measurement
Newton is SI unit of . . . . . . . .?
A. Weight and Velocity
B. Weight and Force
C. Weight and Mass
D. Weight and Acceleration
A. cannot be measured
B. can be expressed in the form of law
C. can be represented completely by its magnitude and unit
D. Both B and C
A. a-2, b-3, c-1, d-4
B. a-2, b-3, c-4, d-1
C. a-1, b-3, c-4, d-2
D. a-4, b-3, c-2, d-1
To identify which option is not a unit of work, let's analyze each:
Work = Force × Distance
SI unit of force = Newton (N)
1 N = 1 kg·m/s²
Work = N × m = (kg·m/s²) × m = kg·m²/s²
So, the SI unit of work is kg·m²/s², which is also called a Joule (J).
Now, let’s check the options:
A. kg·m/s² → This is Newton, which is a unit of force, not work.
→ Not a unit of work.
B. kg·m²/s² → This is the unit of work (Joule).
C. Newton meter (N·m) → Also kg·m²/s², so this is a unit of work.
D. Joule → Defined as kg·m²/s², so this is a unit of work.
Correct answer: A. kg·m/s²