1. Work is a __________ ?

  1. Vector quantity
  2. Fundamental quantity
  3. Scalar quantity
  4. Both (A) and (B)
View Answer

Answer: Option(C)


Memory: Work is a scalar quantity, because it has only magnitude but no direction.

Define work : Definition of Work : If a body gets displaced by applying an external force on it then, the scalar product of that force and displacement is called work.

2. SI unit of work is ?

  1. Newton
  2. Watt
  3. Joule
  4. Calorie
View Answer

Answer: Option(C)


Memory: SI unit of work is joule.

One joule equals

3. If a body gets displaced by applying a force on it, then it is called ?

  1. Energy
  2. Power
  3. Displacement
  4. Work
View Answer

Answer: Option(D)


Memory: If an object gets moved by applying an external force, then it is said to be work is done.

4. When force and displacement are in same direction, then work equals ?

  1. Zero
  2. Infinite
  3. W = FScos𝛉
  4. W = FS
View Answer

Answer: Option(D)


Memory: When force and displacement are in same direction, then the angle between them is o degree, and the value of cosO is 1. Thus, W = FS.

5. In case of uniform circular motion, work done by the centripetal force is ?

  1. Infinite
  2. Zero
  3. One
  4. Can’t be determined
View Answer

Answer: Option(B)


Memory: No memory is available.

6. If a body gets displaced by “S” when a force “F” acting on it, then work is ?

  1. W = FSsin𝛉
  2. W = FScos𝛉
  3. W = FStan𝛉
  4. W = FScot𝛉
View Answer

Answer: Option(B)


Memory: The following is shown work formula :

Work Formula

7. Dimension of work is ?

  1. ML-2T2
  2. ML2T-2
  3. ML3T-2
  4. ML2T-3
View Answer

Answer: Option(B)


Memory: As work equals, Force × Displacement, therefore,

Dimension of work

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