Question

The distance, s(t), in feet traveled by a freely falling object is given by the function s(t) = 16t^2, where t is time in seconds. Use this formula to find the time it would take for an object to fall to the ground from a cliff that is 400 feet high.

Answer 1

16t^2 = 400
=> t^2 = 400/16
=> t^2 = 25
=> t = 5 seconds.

Answer 2

wow, that was fast! you are good at math. thank you!:)

Answer 3

Remember, in this case, even though t can assume + or - 5 in theory, it can't be negative because time can't be negative. So, only positive value is valid.

Answer 4

Yes, i agree.:)