Henry hits a hockey puck in the positive

Question

x-direction at time, t ≈ t0. The puck is then
stopped by a net starting at time, t ≈ t1.
Which of the following curves could describe
the acceleration of the hockey puck if
we ignore any effects of friction?
1.
a t0 t
t

Answer 1

1
A. A straight line from a = 0 at t0 to a = 0 at t1

2.
a t0 t
t1
B. A parabola with a = 0 at t0 and t1

3.
a t0 t
t1
C. A straight line from a = 0 at t0 to a = infinity at t1

4.
a t0 t
t1
D. A parabola with a = infinity at t0 and t1

Answer: A. A straight line from a = 0 at t0 to a = 0 at t1