Consider the following situations: A) A car is moving along a straight road at a constant speed.
B) A car is moving along a straight road while slowing down.
C) A car is moving along a straight road while speeding up.
D) A hockey puck slides along a smooth (i. e., frictionless) icy surface.
E) A hockey puck slides along a rough concrete surface.
F) A cockroach is speeding up from rest.
G) A rock is thrown horizontally; air resistance is negligible.
H) A rock is thrown horizontally; air resistance is substantial.
I) A rock is dropped vertically; air resistance is negligible.
J) A rock is dropped vertically; air resistance is substantial.
Which of these situations describe the motion shown in the motion diagram at point C?
Type the letters corresponding to all the right answers. Do not use commas. For instance, if you think that only situations c and d are correct, type cd.