You're out for a drive in your freshly waxed car. When you reach a straightaway and go at constant speed, your

friend in the back seat reaches out the window and puts a piece of ice on the turnk on the outside of the car. The trunk is flat, horizontal and shielded from wind.The piece of ice on the the trunk is so slippery that friction is negligible.
a) What happens to the ice as you keep driving? (Choose all that apply)
accelerates at a constant rate
speeds up
moves with a changing velocity
falls off the car
slows down
changes direction
keeps going in a straight line
maintains constant velocity

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