If a body falls freely under gravity,the gravitational acceleration will be equal to:?

Question

9.8m/s^2,-8.9m/s^2,-9.8m/s^2,none of the above.

Answer 1

-9.8m/s^2

however most of the time you can just ignore the - because it winds up canceling out

Answer 2

force of gravity-force of wind friction

9.81 m/s^2- (whatever)=terminal velocity

Answer 3

It depends on your reference point. In my engineering class, you can designate the positive g if the object is going upwards, and negative g if its moving downwards.

In other problems where it is easier to solve by designating the positive g when the object is going downwards and negative g if the object is moving upwards.

By convention, majority of teachers use the positive g as moving upwards so I will answer -9.8 m.s^2.