The following is the distance-time table of an object in motion:

Time in seconds	Distance in metres
$0$	$0$
$1$	$1$
$2$	$8$
$3$	$27$
$4$	$64$
$5$	$125$
$6$	$216$
$7$	$343$

$(a)$ What conclusion can you draw about the acceleration? Is it constant, increasing, decreasing, or zero?
$(b)$ What do you infer about the forces acting on the object?

(N/A) The distance covered by the object in equal intervals of time is unequal (it follows the cube of time, $d = t^3$). This indicates non-uniform motion. Since the velocity (rate of change of distance) is increasing at an increasing rate, the acceleration is increasing.
$(b)$ According to Newton's second law of motion, $F = ma$. Since the acceleration $(a)$ of the object is increasing over time, the net force $(F)$ acting on the object must also be increasing.