A spring that is compressed 14.5 cm from its equilibrium position stores 2.99 J of potential energy. Determine the spring consta
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Answer:
b. K = U
Explanation:
In this case you have that there are no non-conservative forces over the pendulum. Hence, the total mechanical energy if the pendulum must conserve. You take into account that the potential and kinetic energy of a pendulum are given by:
m: mass of the pendulum
h: height of the pendulum
v: speed
In each moment of the trajectory of the pendulum ET does not change.
You have that, at the lowest point U=0J and for the highest point K=0J. For that point K=ET and U=ET respectively.
Hence, for a mid-way between those points it is necessary that:
b. K = U
Explanation :
It is given that an oscillator makes 360 oscillations in 3 minutes.
(a) Using unitary method :
No. of vibrations in one minute is,
So, no of vibrations in one minute is 120.
(b) Similarly,
3 minutes = 180 seconds
No of vibrations in one second is
So, the no of vibrations in one second is 2.
(c) Time period of the wave is given by :
The time period of the wave is 0.5 s
(d) The no of vibation per second is called as its frequency.
Hence, this is the required solution.