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2 years ago

if two objects masses 8kg and 24 kg are dropped from top of a building. Which one reaches the ground first

Physics

2 answers:

Nadusha1986 [10]2 years ago

6 0

They will reach the grouns at the same time if we neglect.
Y=1/2 gt²
There is know mass needed in the equation

kherson [118]2 years ago

5 0

<h3>the object weighing 24 kg ( kilograms ) will reach the ground first</h3>

if two objects are the same size but one is heavier, the heavier one has greater density than the lighter object
so when both objects are dropped from the same height and at the same time, the heavier object should hit the ground before the lighter one

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A soccer player kicks a rock horizontally off a 37 m high cliff into a pool of water. If the player hears the sound of the splas

Alchen [17]

<h2>Answer:</h2>

<h2>Explanation:</h2>

In the question,

Height of the cliff, h = 37 m

Time taken to reach the sound to us = 2.92 s

Speed of the sound in air at room temperature = 343 m/s

Now,

Let us say the speed of the ball = u m/s

So,

Time taken by the ball to reach at the bottom, t is given by,

$t=\sqrt{\frac{2h}{g}}\\t=\sqrt{\frac{2\times 37}{9.8}}\\t=2.747\,s$

So,

Splash is heard after = 2.92 s

So,

<u>Time taken by sound to travel the shortest distance along the hypotenuse of the triangle</u> thus formed is,

t = 2.92 - 2.747

t = 0.172 s

Now,

Distance traveled by sound is given by,

$Distance=343\times 0.172\\Distance=59.02\,m$

So,

In the triangle using the Pythagoras Theorem,

Horizontal distance traveled is,

$D=\sqrt{59.02^{2}-37^{2}}\\D=45.99\,m$

So,

Speed of throwing of ball is given by,

$Distance=Speed\times Time\\45.99=u\times 2.747\\u=16.741\,m/s$

<em><u>Therefore, the speed of the ball = 16.741 m/s.</u></em>

(b).

If,

Speed of sound = 331 m/s

So,

<u>Distance traveled by sound</u> is,

$Distance=331\times 0.172\\Distance=56.932\,m$

So,

Distance traveled in the horizontal by ball is,

$Distance=\sqrt{56.932^{2}-37^{2}}\\Distance=43.269\,m$

So,

Speed of the ball thrown is given by,

$Speed=\frac{Distance}{Time}\\Speed=\frac{43.269}{2.747}\\Speed=15.75\,m/s$

<em><u>Therefore, the speed of the ball = 15.75 m/s.</u></em>

8 0

3 years ago

The sphere that refers to Earths water is called the

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3 years ago

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A sound wave traveling at 340 m/s is generated by a 480 Hz tuning fork.

Shtirlitz [24]

Answer:

Wavelength = 0.7083 meters

Explanation:

Given the following data;

Speed of wave = 340 m/s

Frequency = 480 Hz

To find how long is the sound wave, we would determine its wavelength;

Mathematically, the wavelength of a waveform is given by the formula;

Wavelength = velocity/frequency

Wavelength = 340/480

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2 years ago

one thing that stringed, wind, and percussion instruments have in common in regard to the sounds they produce is that a. the ins

mario62 [17]

The answer is:

d) the sound originates from a vibration.

The explanation:

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3 years ago

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An alarm clock draws 0.5 A of a current when connected to a 120 volt circuit. Calculate its resistance

wlad13 [49]

Resistance = (voltage) / (current) =

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3 years ago