Question

value of gravity...is 9.8 m/s^2 or -9.8 m/s^2

Answer 1

-32.2 ft/sec^2

Answer 2

lol

Answer 3

i'll take that as -9.8

Answer 4

it really just depends on which way you consider as positive y direction

usually -9.8m/s^2

Answer 5

depends on your frame of reference....if you are falling freely under the influence of gravity at the lowest point of earth(where value of gravity is 9.81 m/s^2) it will be + and if you are moving against gravitational pull with the acceleration of 19.6m/s^2 it will be -9.8m/s^2

Answer 6

in freefall it's positive?

Answer 7

yes

Answer 8

thanks. that's all i need for now..

Answer 9

if you are moving up wards gravity is opposite to the motion and you would usually have gravity as negative ,
if you are falling from a height the gravity is acting with the motion and you would set it to be positive ,