1) A woman throws a ball straight up into the air. While the ball is in free fal

Question

1) A woman throws a ball straight up into the air. While the ball is in free fall does its acceleration (a) increase, (b) decrease (c) increase and then decrease, (d) decrease then increase or (e) remain constant? Ignore air resistance. 2) Ignoring air resistance, as the ball travels through the air, its speed (a) increases (b) decreases, (c) increases and then decreases (d) decreases and then increases or (e) remains the same.
1) A woman throws a ball straight up into the air. While the ball is in free fall does its acceleration (a) increase, (b) decrease (c) increase and then decrease, (d) decrease then increase or (e) remain constant? Ignore air resistance.

Explanation / Answer

1) Since it is only subject to the acceleration of gravity (9.91 m/s^2) then it has constant acceleration throughout its entire flight. It is a projectile. 2) d is the correct answer. On the way up, its speed decreases since it is fighting gravity, and on the way down, its speed increases since gravity is pushing it down.

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