Question

The height of a golf ball, in meters, x seconds after it has been hit is given by the expression -4.9x^(2) +4.8x+0.1 . When does the ball hit the ground?

Answer 1

t=1

Explanation:

Answer 2

t = 1 second

Explanation:

The height of a golf ball, in meters, x seconds after it has been hit is given by the expression.

`h=-4.9x^2 +4.8x+0.1`

We need to find the time when the ball will hit the ground.

When it hits the ground, h=0

`-4.9x^2 +4.8x+0.1=0`

It is a quadratic equation. The solution of the above equation is :

x = 1 seconds, x = -0.02 seconds

Hence, after 1 second the ball will hit the ground.