an arrow was shot at a target 50 meters away . if arrow moves with velocity 20 m/s . in how much time will be the sound heard if speed in air is 330m/s
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Answer:
(a).
0.33
s
(b).
0.53
m
Explanation:
(
a
)
.
The horizontal component of velocity is constant so we can say:
t
=
s
v
=
20
60
=
0.33
s
(
b
)
.
Now we use the vertical component of the arrow's motion:
s
=
1
2
g
t
2
∴
s
=
0.5
×
9.8
×
0.33
2
s
=
0.53
m
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