All categories

3 years ago

If you kick a football, why does the reaction force not prevent the ball from moving?

2 answers:

8 0

Simply because the reaction force is larger than the mass of the object. A football has little mass, and not alot of friction, therefore, the ball moves.

posledela3 years ago

3 0

Because the force you put into the kick is greater then the force that is being applied to the ball on the other side that you are not kicking
Hope this helped :)

You might be interested in

What happens to plankton during the spring bloom?Which organisms are consumers? (Select all that apply.) coyote, snail ,green al

Mars2501 [29]

Answer:

See explanation

Explanation:

Plankton refers to the small and microscopic organisms drifting or floating in the sea or fresh water, consisting chiefly of diatoms, protozoans, small crustaceans, and the eggs and larval stages of larger animals(Oxford dictionary).

The spring bloom is a sudden growth or increase in plankton abundance. It begins around the early spring and continues until late in the spring or sometimes even early in the summer.

One organism that is a consumer of plankton are the snails. One of the commonest snails that eat plankton are the Nerite Snails.

6 0

3 years ago

The noise from a power mower was measured at 104 dB. The noise level at a rock concert was measured at 121 dB. Find the ratio of

UkoKoshka [18]

Based on the calculations, the ratio of the intensity of Ir to Ip is equal to 50.12.

<h3>How to find the ratio of the intensity?</h3>

Let the intensity of the power mower be Ip.

Let the intensity of the rock music be Ir.

Mathematically, sound intensity level can be calculated by using this formula:

$\beta = 10 log(\frac{I}{I_{ref}} )$

Where:

I is the intensity of the sound.

Making I the subject of formula, we have:

I = Io × $10^{\frac{\beta }{10} }$

For Ip, we have:

Ip = Io × $10^{\frac{104 }{10} }$

Ip = Io × $10^{10.4}$

For Ir, we have:

Ir = Io × $10^{\frac{121 }{10} }$

Ir = Io × $10^{12.1}$

Now, we can find the ratio of the intensity:

Ir/Ip = Io × $10^{12.1}$ /Io × $10^{10.4}$

Ir/Ip = $10^{12.1}$ / $10^{10.4}$

Ir/Ip = $10^{12.1 -10.4}$

Ir/Ip = $10^{1.7}$

Ir/Ip = 50.12.

Read more on sound intensity here: brainly.com/question/17062836

#SPJ1

8 0

2 years ago

A ball is whirled on the end of a string in a horizontal circle of radius R at constant speed v. Which way(s) can increase the c

Sav [38]

Answer:

A, B and F are the right answers

Explanation:

The formula is $a_{c} = v^{2} / r$

A) Increasing both the radius and the speed by a factor of 9

$a_{c} = (9v)^{2} / (9r)$ = $9v^{2} / r$

which means the acceleration will increase by a factor of 9

B) Keeping the speed fixed and decreasing the radius by a factor of 9

$a_{c} = (v)^{2} / (r/9)$ = $9v^{2} / r$

which means the acceleration will increase by a factor of 9

C) Keeping the radius fixed and increasing the speed by a factor of 9

$a_{c} = (9v)^{2} / (r)$ = $81v^{2} / r$

It will increase the acceleration 81 times

D) Keeping the speed fixed and increasing the radius by a factor of 9

$a_{c} = (v)^{2} / (9r)$ = $v^{2} / 9r$

It will decrease the acceleration by 9 times

E) decreasing both the radius and the speed by a factor of 9

$a_{c} = (v/9)^{2} / (r/9)$ = $v^{2} / 9r$

It will decrease the acceleration by 9 times

F) Keeping the radius fixed and increasing the speed by a factor of 3

$a_{c} = (3v)^{2} / (r)$ = $9v^{2} / r$

It will increase the acceleration by 9 times

4 0

3 years ago

How do you determine the specific heat of a substance?

svetlana [45]

Answer:

I think it's A

Explanation:

3 0

3 years ago

In the simple circuit shown, what is the resistance, R? (Remember that V = I*R)

Nookie1986 [14]

B
Bensbsbng f fudge dndjdjd d djdjdbd

5 0

3 years ago