How long will it take for an apple falling from a 29.4 m tall tree to hit the ground?
(A) 1.56 s
(B) 2.04 s
(C) 2.45 s
(D) 3.72 s
ANSWER WITH EXPLANATION ASAP...
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Answer:
answer=2.45 sec
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Answer :2.45 s
Given :
u=0
s(height)=29.4m
a(acceleration)=9.8m/s(gravitational acc)
Find :
t(time)=?
Solution :
As we know
2as=v^2-u^2
2*9.8m/s*29.7m=v^2-0^2
2*9.8m/s*29.7m=v^2-0
v^2=_/2*9.8*29.4
v^2=_/2*9.8*9.8*3
v=9.8_/6m/s
Know
a=v-u/t
9.8=9.8_/6m/s-0m/s/t
t=9.8_/6m/s/9.8m/s^2
t=_/6
=2.449s=2.45s
Given :
u=0
s(height)=29.4m
a(acceleration)=9.8m/s(gravitational acc)
Find :
t(time)=?
Solution :
As we know
2as=v^2-u^2
2*9.8m/s*29.7m=v^2-0^2
2*9.8m/s*29.7m=v^2-0
v^2=_/2*9.8*29.4
v^2=_/2*9.8*9.8*3
v=9.8_/6m/s
Know
a=v-u/t
9.8=9.8_/6m/s-0m/s/t
t=9.8_/6m/s/9.8m/s^2
t=_/6
=2.449s=2.45s
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