Which expression gives the change in gravitational potential energy of an object of…

PHYSICS · Single correct · CBSE · Physics · Work and Energy · Work and Energy

Problem

Which expression gives the change in gravitational potential energy of an object of mass

m

that is displaced vertically by

\Delta y

near Earth’s surface, if upward is taken as the positive direction? (a)

\Delta U = \tfrac12 m g\,\Delta y

(b)

\Delta U = - m g\,\Delta y

(c)

\Delta U = m g\,\Delta y

(d)

\Delta U = m g\,\Delta y + \tfrac12 m v^{2}