An Alternate Solution for Example 4

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Example 4:

A baseball has a velocity of 65 m/s downward after 8.5 seconds in free fall. What was the baseball's original velocity?

Solution:

vo = ?

a = g = 9.8 m/s2 (downward)

= 8.5 s

v = 65 m/s

Here's the plan: We could find v_o from the equation - if we knew the value of . We can find the value of from the equation .

Answer: The original velocity of the baseball was 18.3 m/s upward.

BHS -> Staff -> Mr. Stanbrough -> Physics -> Mechanics -> Kinematics -> Using v = v_o + at -> this page