Consider the scenario where you lift your pencil $($mass $m)$ from the ground to a height $$ h above

the ground.

$6\mathrm{.}1.$ Assuming that you Ift the peneil at aconstants speed, draw the forces acting on the pencil

and denve an expression for the work done by you on the pencil in the process of lifting it to

the height $h.$

$6\mathrm{.}2.$ What is the change in gravitational potential energy of the pencil $(\frac{?}{{?}_{\frac{?}{?}}P{E}_1})?$

$63$ Now conslder what happens when you drop the pencil Describe the energy transformations

that occur.

$64$ Show that the AKE gained by the penciljust belore it strikes the ground is equit to its lon of

gravitational potential energy $(\frac{-}{{?}_{\frac{?}{?}}}P{E}_4).$