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masha68 [24]
3 years ago
8

A point on the string of a violin moves up and down in simple harmonic motion with an amplitude of 1.24 mm and frequency of 875

Hz. a) what is the max speed of that point in SI units? b) what is the max acceleration of the point in SI units?
Physics
2 answers:
Fed [463]3 years ago
8 0

Answer:

a

  v _{max } =  6.82 \ m/s

b

 a_{max} =  37489.5 \  m/s^2

Explanation:

From the question we are told that

   The amplitude is A =  1.24 \  mm  =  1.24 * 10^{-3} \  m

   The frequency is  f =  875 \  Hz

   

Generally the maximum speed is mathematically represented as

           v _{max } =  A *  2 *  \pi * f

=>        v _{max } =  1.24*10^{-3} * 2 * 3.142 *  875

=>        v _{max } =  6.82 \ m/s

Generally the maximum acceleration is mathematically represented as

       a_{max} =  A  * (2 *  \pi *  f)

=>      a_{max} =  1.24*10^{-3} *  (2 * 3.142 *  875 )^2

=>       a_{max} =  37489.5 \  m/s^2

mario62 [17]3 years ago
5 0

Using

V = Amplitude x angular frequency(omega)

But omega= 2πf

= 2πx875

=5498.5rad/s

So v= 1.25mm x 5498.5

= 6.82m/s

B. .Acceleration is omega² x radius= 104ms²

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What is the required force to bring a 1550 kg vehicle moving at 32 m/s to a stop in a distance of 45 m?
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Which of these atoms is the most electronegative? select one: a. si b. cl c. p d. f e. c
katrin [286]

The atom that is the most electronegative is fluorine (F).

<h3>What is electronegative?</h3>

Electronegativity, is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond.

Electronegativity increases across the groups from left to right of the periodic table and decreases down the group.

Examples of electronegative elements arranged in decreasing order;

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4 0
2 years ago
A 49 kg person is being dragged in their sleeping bag to the lake by a 593 N
crimeas [40]

Answer:

f = 485.62 N

Explanation:

Since, the bag is moving with some acceleration. Hence, the unbalanced force will be given as:

Unbalanced Force = Horizontal Component Applied Force - Frictional Force

Unbalanced Force = Fx - f

But, from Newtons Second Law of Motion:

Unbalanced Force = ma

comparing the equations:

ma = Fx - f

f = F Cos θ - ma

where,

f = frictional force  = ?

F = Applied force  = 593 N

m = mass of person = 49 kg

a = acceleration = 0.57 m/s²

θ = Angle with horizontal = 30°

Therefore,

f = (593 N)(Cos 30°) - (49 kg)(0.57 m/s²)

f = 513.55 N - 27.93 N

<u>f = 485.62 N</u>

6 0
3 years ago
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Marat540 [252]

Answer:

A. False, frequency can increase or decrease wavelength.

For example: a high frequency would mean there are shorter wavelengths that occur in a period. Meanwhile, a low frequency would indicate that the wavelengths are longer and in longer periods.

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