A baseball is hit straight up and is caught by the catcher 2.0 s later. The maximum height of
the ball during this interval is:
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OpenStudy (raffle_snaffle):
There isn't anymore information given?
OpenStudy (anonymous):
no
OpenStudy (ineedserioushelp):
The answer is: 12.6m . I had this question before and to find the answer use this: d = (1/2)at^2 with t = 1 second and a = 9.8 m/sec^2 . It took 1 second to go in the air at its top speed and 1 second to fall down.
OpenStudy (anonymous):
the answer is 4.9
OpenStudy (anonymous):
i tried to use max height equation 1/2 V^2(initial in respect to y)/ g
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ganeshie8 (ganeshie8):
4.9 is correct !
OpenStudy (anonymous):
how did you get it????
ganeshie8 (ganeshie8):
easy,
since it took 2s for going up and falling down,
it took 1s for going up
ganeshie8 (ganeshie8):
agree so far ?
OpenStudy (anonymous):
yes!
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ganeshie8 (ganeshie8):
Next, when it reaches top most, its velocity becomes 0
so,
v = u + at
0 = u -g(1)
u = g = 9.8 m/s
ganeshie8 (ganeshie8):
so initial velocity = u = 9.8 m/s
OpenStudy (anonymous):
wait how is acceleration negative?
ganeshie8 (ganeshie8):
now, use the position equation :-
S = ut + 1/2 at^2
S = 9.8(1) - 1/2 g (1)^2
S = 9.8 - 1/2 *9.8
S = 9.8 - 4.9
ganeshie8 (ganeshie8):
very good q
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OpenStudy (anonymous):
how i'm setting things up is up is positive and down is negative