(A): When a person is waling horizontally with a suitcase on his head, no work is done by him against gravitational force (R ): gravitational force on suitcase acts vertically downwards and motion is in horizontal direction, hence dot product becomes zero

(A): When a person is waling horizontally with a suitcase on his head,

1.	(A): When a person is waling horizontally with a suitcase on his head, no work is done by him against gravitational force (R ): gravitational force on suitcase acts vertically downwards and motion is in horizontal direction, hence dot product becomes zero
Answer» Both 'A' and 'R' are TRUE and 'R' is the CORRECT explanation of 'A's Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A's A' is true and 'R ' is false A' is false and 'R' is true Answer :A