Free Fall
A body moving freely under gravity has a constant acceleration of 9.8 m/s2 downwards towards the centre of the earth. This can be proved by the following:
mg=ma (during free fall)
Here m gets cancelled out,
g=a
As we already know that the force gravity on 1 kg mass is 9.8 N ,therefore the acceleration of free fall is also 9.8 m/s2 .
It is evident from the following that a body moving freey under gravity , increases its speed by 9.8m/s every second.
No comments:
Post a Comment