Answers

2015-09-10T16:55:51+05:30
In upward
u=4.9
g= -9.8
v=0
so, t=v-u/g
t=1/2 sec
now in downward
t=1/2
g=9.8
u=0
so,v=u+at
v=0+9.8*1/2
v=4.9 m/s

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