1. Ja pendulum has a length of 0,500 m.What is the period of the pendulum? Use
1 answer:
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Answer:
F = 800 [N]
Explanation:
To be able to calculate this problem we must use the principle of momentum before and after the impact of the hammer.
We must summarize that after the impact the hammer does not move, therefore its speed is zero. In this way, we can propose the following equation.
ΣPbefore = ΣPafter
where:
m₁ = mass of the hammer = 0.15 [m/s]
v₁ = velocity of the hammer = 8 [m/s]
F = force [N] (units of Newtons)
t = time = 0.0015 [s]
v₂ = velocity of the hammer after the impact = 0
Note: The force is taken as negative since it is exerted by the nail on the hammer and this force is directed in the opposite direction to the movement of the hammer.
Answer:
Speed:
Wavelength:
Frequency:
Explanation:
The speed of the laser as it travels through polystyrene can be determine by means of the equation of the refraction index:
(1)
Where c is the speed of light and v is the speed of the laser in the medium.
Therefore, v will be isolated from equation 1
Hence, the speed of the laser has a value of
Frenquency:
Since, wavelength is the only one who depends on the media. Therefore the frequency in both medium will be the same.
To determine the frequency it can be used the following equation
(2)
Where c is the speed of light, is the frequency and
is the wavelength
Then, wil be isolated from equation 2.
(3)
Before using equation 3 it is necessary to express in units of meters.
⇒
Hence, the frequency of the laser has a value of
Wavelength:
To determine the wavelength it can be used:
Where v is the speed of the laser through the polystyrene.
Hence, the wavelength of the laser has a value of