Question

A football is kicked vertically upward from a height of 5 feet with an initial speed of 60 feet per second. The formula h=5+60t-16t^2 describes the balls height above the ground, h, in feet, t seconds after it was kicked. Use this formula to find the balls height 1 second after it was kicked

Answer 1

The Solution:

Given:

`h=5+60t-16t^2`

We are required to find the height of the ball after 1 second that it was kicked.

We shall substitute 1 for t in the given function.

`h(1)=5+60(1)-16(1)^2=5+60-16=49feet`

Therefore, the correct answer is 49 feet.