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.
D
You might also like to view...
Mass transportation systems are often difficult to establish because
A. They are economically feasible only in rural areas. B. People will not use them. C. Many metropolitan areas have very dispersed housing patterns. D. All of these statements are correct.
Which of the following best describes energy collection and conversion in a tree?
A) Leaves collect and chlorophyll converts. B) Leaves convert and chlorophyll collects. C) Roots collect and leaves convert. D) Seeds collect and leaves convert.
Off the northern Atlantic coast, cod populations were severely depleted by the 1990s. Biologists who successfully argued for fishing bans on cod to allow the cod populations recover argued for the
A) aesthetic value of cod. B) institutional value of cod. C) intrinsic value of cod. D) instrumental value of cod.
Climax vegetation can be closely associated with the concept of ________
A) extinction B) natural selection C) equilibrium D) disturbance E) human disturbance