a baseball pitcher throws a baseball with a speed of 41m/s. Estimate the average acceleration of the ball during the throwing motion. In throwing the baseball, the pitcher accelerates the ball through a displacement of 3.5m... I worked it out but my answer is wrong and I don't know why..

Question

anonymous · Answer

it is  240.14m/s^2 isn't it?

anonymous · Answer

yes but how?  you are like a physics genius..can i borrow your brain for my exam?

anonymous · Answer

lol, you make me blush! 
You see, the pitcher has accelerated the ball from rest to 41m/s in a distance of 3.5m
So, using

anonymous · Answer

v=u+at   -(1)
s=(v+u)1/2t -(2)
So ans: 240.1428ms^-2

anonymous · Answer

$$v _{f}^{2}=v _{0}^{2}+2as$$
calculate 'a'

anonymous · Answer

@Mif.100  how did you find the time?

anonymous · Answer

@rajathsbhat  and then after that i can calculate time with v=vo x at?

anonymous · Answer

yes.

anonymous · Answer

@rajathsbhat  didn't you leave out the displacement part? v^2=vi^2+2a(x-xi)

anonymous · Answer

in  v=u+at

anonymous · Answer

s=displacement

anonymous · Answer

oo okay, thank you! :) i have two more questions.. will post them soon! x

anonymous · Answer

welcm

anonymous · Answer

looking forward to it :)