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A baseball player throws a ball into the air with an initial speed of 22 m/s (up). Ignore air resistance.

(a) How high does the ball go?
(b) How long is the ball in the air before she catches it?

1 Answer

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Final answer:

The ball reaches a height of 24.6 m and is in the air for a total time of 2.24 s before being caught.

Step-by-step explanation:

In the vertical direction, the initial velocity is 22 m/s and we can assume that the final velocity is 0 m/s at the highest point of the ball's trajectory. Using the kinematic equation, we can determine the displacement (height) of the ball using the following formula:

Δy = v₀yt + (1/2)gt², where v₀y is the initial velocity in the vertical direction, t is the time, and g is the acceleration due to gravity (approximately 9.8 m/s²).

Substituting the given values, we have Δy = (22 m/s)(t) - (1/2)(9.8 m/s²)(t²) = 0.

Rearranging the equation and solving for t, we get t = 2.24 s.

Substituting the value of t back into the previous equation, we can find the height of the ball:

Δy = (22 m/s)(2.24 s) - (1/2)(9.8 m/s²)(2.24 s)² = 24.6 m.

In the horizontal direction, the initial velocity is 0 m/s and the final velocity is also 0 m/s because the ball returns to the same horizontal position.

Using the equation d = v₀xt, where d is the distance, v₀x is the initial velocity in the horizontal direction, and t is the time, we can determine the time it takes for the ball to return to the initial position.

Substituting the given values, we have 0 = (16 m/s)t.

Since the initial velocity is 0 m/s, the time it takes for the ball to return to the initial position is t = 0 s.

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