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2 years ago

8

You turn on the faucet for your garden hose and let go immediately the end search flying around and spraying water everywhere wh

ich of newtons laws of motion does this motion represent

1 answer:

max2010maxim [7]2 years ago

7 0

It’s Newton’s third law

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Give me as many as possible benefits for the neck stretch.

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If you have a neck cramp, so you don't hurt it when working/playing, to loosen the neck muscles

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2 years ago

When you throw a ball, the work you do to accelerate it equals the kinetic energy the ball gains. If you do twice as much work w

aniked [119]

Answer:

No. Twice as much work will give the ball twice as much kinetic energy. But since KE is proportional to the speed squared, the speed will be $sqrt{2}$ times larger.

Explanation:

The work done on the ball is equal to the kinetic energy gained by the ball:

$W=K$

So when the work done doubles, the kinetic energy doubles as well:

$2W = 2 K$

However, the kinetic energy is given by

$K=\frac{1}{2}mv^2$

where

m is the mass of the ball

v is its speed

We see that the kinetic energy is proportional to the square of the speed, $v^2$ . We can rewrite the last equation as

$v=\sqrt{\frac{2K}{m}}$

which also means

$v=\sqrt{\frac{2W}{m}}$

If the work is doubled,

$W'=2W$

So the new speed is

$v'=\sqrt{\frac{2(2W)}{m}}=\sqrt{2}\sqrt{\frac{2W}{m}}=\sqrt{2} v$

So, the speed is $\sqrt{2}$ times larger.

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3 years ago

How can you get acceleration when talking about speed?

vagabundo [1.1K]

Answer:

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Explanation:

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2 years ago

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3 years ago

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2 years ago