A truck loaded with sand accelerates along a highway. The driving force on the truck remains constant. What happens to the acceleration of the truck as its trailer leaks sand at a constant rate through a hole in its bottom?

(a) It decreases at a steady rate.

(b) It increases at a steady rate.

(c) It increases and then decreases.

(d) It decreases and then increases

In outer space, a positive charge q is released near a positive fixed charge Q, as shown in the figure. As q moves away from Q, what is true about the motion of q? (There may be more than one correct choice.)

1)It will move with decreasing speed.

2)It will move with constant acceleration.

3)It will move with increasing acceleration.

4)It will move with decreasing acceleration.

5) It will move with increasing speed.