True or false: a) an object will have the same mass on the moon as it does on earth. b) an object will weigh more on the moon than on earth. c) if you tried to kick a bowling ball across the surface of the moon, it would be just as hard to accelerate it on the moon as it would on earth. d) a bowling ball would fall faster on earth than on the moon.

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.