A ball tossed vertically upward rises, reaches its highest point, ...

[mmm]

A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always
 
  A) in the direction of motion.
  B) opposite its velocity.
  C) directed upward.
  D) directed downward.
  E) none of the above

Question 2

The time it takes a car to attain a speed of 30 m/s when accelerating from rest at 2 m/s2 is
 
  A) 2 s.
  B) 15 s.
  C) 30 s.
  D) 60 s.
  E) none of the above

[GCabra]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: B