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A football is kicked vertically upward from a height of 3 feet with an initial speed of 45 feet per second.

A football is kicked vertically upward from a height of 3 feet with an initial speed of 45 feet per second. The formula h equals 3 plus 45 t minus 16 t squared describes the ball's height above the ground, h, in feet, t seconds after it was kicked. Use this formula to find the ball's height 1 second after it was kicked.

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Arturo O. | Experienced Physics Teacher for Physics TutoringExperienced Physics Teacher for Physics ...
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h(t) = -16t2 + 45t + 3,
 
with t in seconds and h(t) in feet.
 
h(1) = [-16(1)2 + 45(1) + 3] feet = ? feet
 
Just evaluate the expression on the right and get your answer.