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Travka [436]
4 years ago
13

An object thrown straight up falls back and is caught at the same place it is launched from. Its time of flight is T; its maximu

m height is H. Neglect air resistance. What is its average velocity for the second half of the trip
Physics
1 answer:
Natasha_Volkova [10]4 years ago
7 0

Answer:

The average velocity for the second half of the trip is -2H/T

Explanation:

Given;

time of flight as T

maximum height as H

The maximum height of the flight is given by;

H = \frac{1}{2}aT^2\\\\ a = \frac{2H}{T^2}\\\\ But \ average \ velocity \ is \ given \ by , v = aT\\\\v = (\frac{2H}{T^2} )T\\\\v = \frac{2H}{T} \ (This \ is \ the \ average \ velocity \ for \ the \ entire \ trip)\\\\During \ the \ second \ half \ of \ the \ motion, the  \ height \ of \ travel \ is \ -H \ (negative \ direction)\\\\The \ time \ of  \ travel \ is \ \frac{1}{2} \ of  \  time \ of \ flight \ (T) = \frac{T}{2} \\\\The \ average \ velocity = \frac{-H}{T/2} = \frac{-2H}{T}

Therefore, the average velocity for the second half of the trip is -2H/T

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If an object has two forces that are equal in magnitude, but acting on it in opposite directions, what are some possible things
Oksi-84 [34.3K]

Answer: The body will be in a position of rest

Explanation:

Since both forces are equal and acting in opposite direction on the body. It will make the body to be in a state of rest or equilibrium because the sum of the forces acting in the body will be zero.

5 0
3 years ago
What is the meaning of velocity?
masha68 [24]
Velocity is the displacement of an object over the amount of time.  It is not the same as speed.  If an object travels 4 miles forward and then 4 miles back all in one hour, its speed is 8 mph. However, displacement is the difference between the final position and the initial position. So in this case, the average velocity would be 0 because its final and initial positions were the same. 
6 0
4 years ago
A damped harmonic oscillator consists of a mass on a spring, with a small damping force that is proportional to the speed of the
exis [7]

Answer:

2.19 N/m

Explanation:

A damped harmonic oscillator is formed by a mass in the spring, and it does a harmonic simple movement. The period of it is the time that it does one cycle, and it can be calculated by:

T = 2π√(m/K)

Where T is the period, m is the mass (in kg), and K is the damping constant. So:

2.4 = 2π√(0.320/K)

√(0.320/K) = 2.4/2π

√(0.320/K) = 0.38197

(√(0.320/K))² = (0.38197)²

0.320/K = 0.1459

K = 2.19 N/m

4 0
4 years ago
The human ear canal is about 2.9 cm long and can be regarded as a tube open at one end and closed at the eardrum. What is the fu
solniwko [45]

The frequency of the human ear canal is 2.92 kHz.

Explanation:

As the ear canal is like a tube with open at one end, the wavelength of sound passing through this tube will propagate 4 times its length of the tube. So wavelength of the sound wave will be equal to four times the length of the tube. Then the frequency can be easily determined by finding the ratio of velocity of sound to wavelength. As the velocity of sound is given as 339 m/s, then the wavelength of the sound wave propagating through the ear canal is  

Wavelength=4*Length of the ear canal

As length of the ear canal is given as 2.9 cm, it should be converted into meter as follows:

wavelength = 4*2.9*10^{-2} =0.116

Then the frequency is determined as

f=c/λ=339/0.116=2922 Hz=2.92 kHz.

So, the frequency of the human ear canal is 2.92 kHz.

4 0
3 years ago
Can you ever hold your Moon sphere in the light and have it be more or less than half-lit?
Anettt [7]
No if in the light it would be always half lit
5 0
3 years ago
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