Q. If a body falls freely under the effect of gravity in air over the earth surface then
(A) Work done by gravity is positive (B) Work done by air frictional force is positive
(C) Work done by gravity is negative (D) Work done by air fictional force is negative
Dear Student ,
When ball falls freely, gravitational force acts on it due to which ball move toward the centre of the earth i.e. in the direction of the force. Therefore displacement and force applied both are in same direction. SO angle between them is zero.
So option (1) is correct
Regards
When ball falls freely, gravitational force acts on it due to which ball move toward the centre of the earth i.e. in the direction of the force. Therefore displacement and force applied both are in same direction. SO angle between them is zero.
So option (1) is correct
Regards