Question

Statement I: It is harder to open and shut the door if we apply force near the hinge.
Statement II: For a given applied force, torque is maximum at hinge of the door.

• A. Both statement I and II are correct.
• B. Both statement I and II are incorrect.
• C. Statement I is correct but statement II is incorrect.
• D. Statement II is correct but statement I is incorrect._

Answer 1

Answer: (A)

As the concept of centre of mass is only theoretical, therefore in practice no mass may lie at the centre of mass. For example, centre of mass of a uniform circular ring is at the centre of the ring where there is no mass