Assertion (A): A heavier object placed at a far distance from the pivot point will have the same moment as a lighter object placed close to the pivot point.

Reason (R): The moment of force is determined by the magnitude of the force along with its distance from the pivot point.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true and R is not the correct explanation of A.
3. assertion is false but reason is true.
4. assertion is true but reason is false.

Assertion (A): The centre of gravity of an irregularly-shaped object always lies at its geometric centre.

Reason (R): The centre of gravity depends on the distribution of mass within an object.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true and R is not the correct explanation of A.
3. assertion is false but reason is true.
4. assertion is true but reason is false.

Give one example of motion in which speed remains uniform, but the velocity changes.

Name and define the force required for circular motion. State its direction.