If a ball is dropped, how long must it fall to attain a velocity of 12.55m/s?

Guest Mar 22, 2015

#1**+10 **

did you need to use physics formula or calculus?

If a ball is dropped, how long must it fall to attain a velocity of 12.55m/s?

I will assume that you are on Earth near seal level gravity=9.8m/s^2

a=9.8, u=0, v=12.55, t=?

v=u+at

12.55=0+9.8*t

12.55=9.8t

$${\frac{{\mathtt{12.55}}}{{\mathtt{9.8}}}} = {\frac{{\mathtt{251}}}{{\mathtt{196}}}} = {\mathtt{1.280\: \!612\: \!244\: \!897\: \!959\: \!2}}$$

1.28 seconds

If you need to use calc you can ask and it shall be done.

Melody
Mar 23, 2015

#2**+5 **

That linear formula looks pretty straight forward to me, Melody......

Is it more confusing with calculus???

CPhill
Mar 23, 2015