Answer the following questions for projectile motion on level ground assuming negligible air resistance (the initial angle being neither 0º nor 90º: (a) Is the acceleration ever zero? (b) Is the acceleration ever in the same direction as a component of velocity? (c) Is the acceleration ever opposite in direction to a component of velocity?
A. (a) No, (b) No, when the projectile is coming down, (c) No, on way up, because the acceleration is always downward throughout the satellite trip.
B. (a) No, (b) Yes, when the projectile is coming down, (c) Yes, on way up, because the acceleration is always downward throughout the satellite trip.
C. (a) Yes, (b) No, when the projectile is coming down, (c) Yes, on way up, because the acceleration is always downward throughout the satellite trip.
Answer: B. (a) No, (b) Yes, when the projectile is coming down, (c) Yes, on way up, because the acceleration is always downward throughout the satellite trip.
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