Question

An object of mass 1 kg is raised through a height of 10 m. The work done is

Answer 1

WD = -mgh

WD = - 1×9.80665×10

WD = -98.0665J

negative sign shows that work is done against the gravity.

Answer 2

Mass of object = 1kg
height= 10 m
g= m/s^2

Work done= Potential energy
Work done = mgh

$= 1 \times 10 \times 9.8$
$98 \: joules$