Because the __ signal changes smoothly, like a sine wave, it can closely mimic a human voice. however, part of the signal can easily get lost to __ . because __ signals are on or off, like a square wave, they best carry information that can easily be converted into numbers. these signals are __ affected by noise.

options for the blanks:
noise
analog
digital
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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.