Question

A ball is thrown directly downward with an initial speed of 8.05m/s, from a height of 30.2m. After what time interval does it strike the ground?

Answer 1

PROBABLY INCORRECT:I just faintly remember from Algebra 2

-16x^2+8.05x+30.2
Use quadratic formula to get about 1.9 ish
AGAIN PROBABLY WRONG

Answer 2

Answer:

2.9 seconds

Explanation:

The time we must take is positive since it has a valid physical answer, The negative one stands for traveling to the past something still we are unable to do.