Question

Example 1: A baseball is thrown downward from a 50-ft tower with an initial speed of 18 ft/s. Determine the speed at which it hits the ground and the time of travel.

Answer 1

Given,

Initial height of the baseball (or the tower);

Yo=50 ft

Initial velocity (downwards);

Vo=-18 ft/s

Acceleration is acting downwards due to gravity;

Final position of the ball when it hits the ground level;

y=0

Vertical displacement;

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By third equation of motion;

수 1,2 = (-18)2+2(-32.2)(0-50)

u= 59.53 ft/s (.)

...(Answer)

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Second equation of motion is;

...(Answer)