If an object weighs 80 Newtons, what force must be applied to the rope to raise the object when the mechanical advantage is four
1 answer:
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Answer:
Option d and e are correct.
Explanation:
The expression for velocity of pulse in a stretched string can be given as follows
v =
where T is tension in the string , m is mass of string per unit length.
Use of lighter string of the same length, under the same tension amounts to higher m so velocity will decrease. Hence option d is correct.
Similarly, v is directly proportional to square root of tension. So if we increase tension , velocity also increases. So option e ) is correct.
Answer:
The frequencies are
Explanation:
From the question we are told that
The speed of the wave is
The length of vibrating clothesline is
Generally the fundamental frequency is mathematically represented as
=>
=>
Now this other frequencies of vibration experience by the clotheslines are know as harmonics and they are obtained by integer multiple of the fundamental frequency
So
The frequencies are mathematically represented as
=>
Where n = 1, 2, 3 ....