Which best describes the energy used to pluck guitar strings to make sound?
2 answers:
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Answer:
<em>t=3.5 seconds</em>
Explanation:
<u>Moving at Constant Speed</u>
Let's suppose and object travels in a constant direction and covers the same distances x at the same time t, we say it has a constant speed. It can be computed as:
The time taken to go through the distance x is computed by
Our shark moves at v=12 m/s and we need to compute the time it takes to swim x=42 m, so we have
It takes the shark 3.5 seconds to swim 42 m
To solve this problem it is necessary to apply the concepts related to the momentum. The moment can be basically defined as the product of the mass and velocity of an object. Mathematically it is expressed as
Where,
m = mass
V = Velocity
From the statement it is noted that there is a conservation of Momentum but given in different directions, to which we could affirm that there is the momentum of throw and momentum of return
Our values are given as
Under the values given the moment with respect to the ball - and which is subsequently transmitted to people - it would be given by
If the moment is conserved the speed of each of the Skaters would be:
Therefore the velocity of each of the two skaters is 0.04m/s moving apart.