What makes output energy less than input energy?
2 answers:
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Answer:1.301 s
Explanation:
Given
Initial Velocity(u)=30 m/s
Height of cliff=8.3 m
Time taken to cover 8.3 m
here Initial vertical velocity is 0
Horizontal distance
The velocity of the wave on the string is given by
Solving the above equation,
The frequency of the wave and wave length is
The velocity is
Substituting numerical values,
The length of the string is
Answer:
b) Springs oscillate with the same frequency,
Explanation:
expression for frequency of vibration of mass hanging from a spring is given as follows
f =
k is force constant of spring and m is mass vibrating .
In the present case, if mass stretches the spring by x and remains balanced
mg = k x
g and x are same for both cases
will also be same for both cases .
Hence frequency of vibration will also be same for both the balls .