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jeka57 [31]
3 years ago
10

Two astronauts on opposite ends of a spaceship are comparing lunches. One has an apple, the other has an orange. They decide to

trade. Astronaut 1 tosses the 0.110 kg apple toward astronaut 2 with a speed of vi,1 = 1.13 m/s . The 0.150 kg orange is tossed from astronaut 2 to astronaut 1 with a speed of 1.25 m/s . Unfortunately, the fruits collide, sending the orange off with a speed of 0.977 m/s in the negative y direction.
Physics
1 answer:
vesna_86 [32]3 years ago
3 0

Answer:

The speed and direction of the apple is 1.448 m/s and 66.65°.

Explanation:

Given that,

Mass of apple = 0.110 kg

Speed = 1.13 m/s

Mass of orange = 0.150 kg

Speed = 1.25 m/s

Suppose we find the final speed and direction of the apple in this case

Using conservation of momentum:

Before:

In x direction,

P_{b}=m_{p}v_{p}-m_{o}v_{o}

P_{b}=0.110\times1.13-0.150\times1.25

P_{b}=−0.0632\ kg-m/s

In y direction = 0

After:

v_{ay} is velocity of the apple in the y direction

v_{ax} is the velocity of the apple in the x direction

Momentum again:

In x direction,

0.110\times v_{ax}+0=−0.0632

v_{x}=\dfrac{−0.0632}{0.110}

v_{x}=−0.574\ m/s

In y-direction,

0.110\times v_{ay}-0.150\times0.977=0

v_{ay}=\dfrac{0.150\times0.977}{0.110}

v_{ay}=1.33\ m/s

We need to calculate the speed of apple

v_{a}=\sqrt{(v_{x})^2+(v_{y})^2}

Put the value into the formula

v_{a}=\sqrt{(−0.574)^2+(1.33)^2}

v_{a}=1.448\ m/s

We need to calculate the direction of the apple

Using formula of angle

\tan\theta=\dfrac{v_{ay}}{v_{ax}}

Put the value into the formula

\theta=\tan^{-1}(\dfrac{1.33}{0.574})

\theta=66.65^{\circ}

Hence, The speed and direction of the apple is 1.448 m/s and 66.65°.

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A rock of mass 200 g is attached to a 0.75 m long string and swung in a vertical plane.
Ainat [17]

Hello!

a) Assuming this is asking for the minimum speed for the rock to make the full circle, we must find the minimum speed necessary for the rock to continue moving in a circular path when it's at the top of the circle.

At the top of the circle, we have:

- Force of gravity (downward)

*Although the rock is still connected to the string, if the rock is swinging at the minimum speed required, there will be no tension in the string.

Therefore, only the force of gravity produces the net centripetal force:

\Sigma F = F_g\\\\F_c = F_g\\\\\frac{mv^2}{r} = mg

We can simplify and rearrange the equation to solve for 'v'.

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b)
Let's do a summation of forces at the bottom of the swing. We have:
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The horn on a fire truck sounds at a pitch of 350 hz a. what is the perceived frequency when the fire truck is moving toward you
solong [7]

The perceived frequency when the fire truck is moving toward you and away from you will be 370 Hz and 329.59 Hz respectively.

<h3>What is the Doppler effect?</h3>

A sudden change in the frequency due to the distance between the objects and source is explained by the doppler effect.

As the source and observer travel toward each other, the frequency of sound, light, or other waves increases or decreases.

The perceived frequency when the fire truck is moving toward you;

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The perceived frequency when the fire truck is moving away from you;

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Hence, the perceived frequency when the fire truck in cases 1 and 2 will be 370 Hz and 329.59 Hz.

To learn more about the doppler effect refer to the link;

brainly.com/question/15318474

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