$($b$)$ A different object is dropped from rest and begins to fall.

The graph shows how the speed of this object varies with time.

i$)$ Draw arrows on the diagram

below to show the forces acting

on the object at $C$ and

label them

$(2)$

$Sp$

$in$

object

ii$)$ Explain the shape of the graph from $A$ to $C.$

You should use ideas about forces to help your answer.