A person slowly lifts a block of mass m through a vertical height h, and then walks horizontally a distance d while holding the block. What is the total work done by the person?
Dear student
Total work done by person is against the gravity and moving horizontal distance d
The work done by person against gravity is -mgh
and the work done by person in moving distance d is 0 since angle between force and displacement 90 degree.
Hence Wtotal= -mgh+0=-mgh
Total work done by person is against the gravity and moving horizontal distance d
The work done by person against gravity is -mgh
and the work done by person in moving distance d is 0 since angle between force and displacement 90 degree.
Hence Wtotal= -mgh+0=-mgh