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3 years ago

What is the net force on this object?

Physics

2 answers:

NemiM [27]3 years ago

6 0

There is no net vertical force.

The 20N upward is exactly balanced by the 20N downward.

There IS a net horizontal force.

(22N to the right) + (14N to the left) = 8 N to the right.

The net force acting on this object is 8 newtons to the right.

I hope this helped you :D

damaskus [11]3 years ago

5 0

Upward and downward forces cancel out. Net force is 8 newtons to the right

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Un diapasón vibra a 140 [Hz] y la onda emitida por él se propaga con una rapidez de 340 m/s.Considerando lo anterior, se puede a

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The question is: A tuning fork vibrates at 140 [Hz] and the wave emitted by it propagates with a speed of 340 m / s. Considering the above, it can be correctly stated that the wavelength of the wave emitted by the tuning fork is

Answer: Wavelength of the wave emitted by the tuning fork is 2.43 m.

Explanation:

Given: Frequency = 140 Hz

Speed = 340 m/s

wavelength = ?

Formula used to calculate the wavelength is as follows.

$\lambda = \frac{v}{f}$

where,

$\lambda$ = wavelength

v = speed

f = frequency

Substitute the values into above formula.

$\lambda = \frac{v}{f}\\= \frac{340 m/s}{140 Hz} (1 Hz = 1 s^{-1})\\= 2.43 m$

Thus, we can conclude that wavelength of the wave emitted by the tuning fork is 2.43 m.

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2 years ago

A wheel rotating about a fixed axis has a constant angular acceleration of 4.0 rad/s2. In a 4.0-s interval the wheel turns throu

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Answer:

The time interval is $t = 3 \ s$

Explanation:

From the question we are told that

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The angular displacement is $\theta = 80 \ radians$

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So substituting values

$80 = w_i * 4 + 0.5 * 4.0 * (4^2)$

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Now considering this motion starting from the start point (that is rest ) we have

$w__{4.0 }} = w__{0}} + \alpha * t$

Where $w__{0}}$ is the angular velocity at rest which is zero and $w__{4}}$ is the angular velocity after 4.0 second which is calculated as 12 rad/s s

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2 years ago

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Answer:

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Explanation:

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3 years ago

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