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WAEC Physics 2018 Paper
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© africaexams.com
Question : 35
Total: 50
A wire of length 400cm is stretched between two fixed points. When plucked, its fundamental frequency is 150Hz. Calculate the speed of the wave produced.
250
m
s
−
1
625
m
s
−
1
1200
m
s
−
1
1500
m
s
−
1
Validate
Solution:
The fundamental frequency
(
f
0
)
=
v
2
l
f
0
=
150
H
z
;
l
=
400
c
m
=
4
m
150
=
v
2
×
4
v
=
150
×
8
=
1200
m
s
−
1
© africaexams.com
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