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A wave in slinky travelled to and fro in 5 sec the length of the slinky is 5m. What is the velocity of wave?a. $10\ m/s$b. $5\ m/sc. $2\ m/s$d. $25\ m/s$
Here given, length of the slinky $=5\ m$
Therefore, distance traveled $=2\times5=10\ m$ [the slinky is moving to and fro]
Time taken $t=5\ second$
Therefore, velocity of the wave $=\frac{distance}{time}$
$=\frac{10\ m}{5\ s}=2\ m/s$
Therefore, option $C$ is correct.
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