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3 years ago

What acceleration does the force of earth's gravity peoduce

1 answer:

8 0

Near Earth's surface, gravitational acceleration is approximately 9.81 m/s2, which means that, ignoring the effects of air resistance, the speed of an object falling freely will increase by about 9.81 metres per second every second.

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A wire is stretched between two posts. Another wire is stretched between two posts that are four times as far apart. The tension

Elena-2011 [213]

Answer:

Therefore,

The speed of the wave on the longer wire is 95 m/s.

Explanation:

Given:

For Short wire, speed is

$v_{s}=190\ m/s$

Let length of Short and Longer wire be $L_{s}\ and\ L_{l}$ such that

$L_{l}=4\times L_{s}$

To Find:

$v_{l}=?$ Speed on the longer wire

Solution:

The speed of a pulse or wave on a string under tension can be found with the equation,

$v=\sqrt{\dfrac{F_{T}\times L}{m}$

Where,

$F_{T}$ = Tension on the wire

L = Length of Sting

m = mass of String

So here we have,

$F_{T}$ = same

$L_{l}=4\times L_{s}$

Therefore,

$v_{s}=\sqrt{\dfrac{F_{T}\times L_{s}}{m}$ ......equation ( 1 )

And

$v_{l}=\sqrt{\dfrac{F_{T}\times L_{l}}{m}$ .......equation ( 2 )

Dividing equation 1 by equation 2 and on Solving we get

$\dfrac{v_{s}}{v_{l}}=\sqrt{\dfrac{L_{s}}{L_{l}}}$

Therefore,

$v_{l}=v_{s}\sqrt{\dfrac{4\times L_{s}}{L_{s}}}=190\times 2=380\ m/s$

Therefore,

The speed of the wave on the longer wire is 95 m/s.

8 0

4 years ago

ASAP <br> What is elastic potential energy?

chubhunter [2.5K]

Answer:

Elastic potential energy is stored when materials stretch or compress. Examples of it include springs, rubber bands, and slingshots.

Explanation:

3 0

3 years ago

What is the velocity of a car if it travels east 340 meters in 10 seconds? V = d/t

Nadya [2.5K]

Answer:

The awnser is d

Explanation:

i know cause i took the test

6 0

3 years ago

Read 2 more answers

1) How much work is done when a force of 50N<br> pulls a wagon 20 meters?

katrin2010 [14]

Answer:

100J

Explanation:

50N*20m=100J

N*m=J(joule)

4 0

3 years ago

Marisa does 3.2J of work to lower the window shade in

Pani-rosa [81]

Work is considered as the Force performed on a body to move it a certain distance, that is

W = Fd

Here

W = Work

F = Force

d = Distance

In this case we have the values of work and distance, therefore clearing for the Force we would have to

$F = \frac{W}{d}$

Replacing,

$F = \frac{3.2J}{8m}$

$F = 0.4N$

Therefore the force that Marissa must exert on the windows shade is 0.4N

5 0

3 years ago