To the picture the answer is A. I can’t answer the typed question because I need the picture for the box
It would be rock by erosion bc the rocks erode to form a volcano
The net force acting on the object perpendicular to the table is
∑ F[perp] = F[normal] - mg = 0
where mg is the weight of the object. Then
F[normal] = mg = (15 kg) (9.8 m/s²) = 147 N
The maximum magnitude of static friction is then
0.40 F[normal] = 58.8 N
which means the applied 40 N force is not enough to make the object start to move. So the object has zero acceleration and does not move.
If the car moves along the distance it will be 16 of the line graph where is independent of the graph
The object in the lower orbit will move faster in its orbit, and will have a shorter orbital period. None of that depends on their masses either.
