Question

can object of mass 40 kg is raised to
the height of 5 metres above
5 metres above the ground,
its
potential energy? If the object

allowed to fall find its kinetic
energy when eta
when its is Half way down​

Answer 1

Answer:

Gravitational potential energy is given by the expression,

W = m g h

Where,

h = Vertical displacement = 5 m

m = Mass of the object = 40 kg

g = Acceleration due to gravity = 9.8 m sˆ’2

ˆ´ W = 40 — 5 — 9.8 = 1960 J.

At half-way down, the potential energy of the object will be 1960/2= 980 J.

At this point, the object has an equal amount of potential and kinetic energy. This is due to the law of conservation of energy. Hence, half-way down, the kinetic energy of the object will be 980 J.