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3 years ago

PLEASEEEE HELP :( it would mean a lot

Physics

2 answers:

Annette [7]3 years ago

8 0

Answer:

Each object exerts a force on the other, and the two forces are equal and in opposite directions .

Explanation:

Newton's 3rd Law Of Motion: For every action, there is an equal and opposite reaction.

Hope this helped!

Elis [28]3 years ago

5 0

Answer:

Each object exerts a force on the other, and the two forces are equal and in opposite directions

Explanation:

Newton's 3rd Law Of Motion:

For every action, there is an equal and opposite reaction.

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is weigh-in time for the local under-85-kg rugby team. The bathroom scale used to assess eligibility can be described by Hooke’s

yulyashka [42]

Answer:

a) 156960 N/m

b) Yes the player can play on the team.

Explanation:

F = Force

a = Acceleration due to gravity = 9.81 m/s²

m = Mass

k = Spring constant

x = Deformation length of spring

F = ma

From Hooke's law

$F=kx\\\Rightarrow ma=kx\\\Rightarrow k=\frac{ma}{x}\\\Rightarrow k=\frac{120\times 9.81}{0.0075}\\\Rightarrow k=156960\ N/m$

The effective spring constant is 156960 N/m

When x = 0.48 cm = 0.0048 m

$m=\frac{kx}{a}\\\Rightarrow m=\frac{156960\times 0.0048}{9.81}\\\Rightarrow m=76.8\ kg$

The mass of the player is 76.8 kg which is less than the required mass limit of the players' which is 85 kg. So, the player is eligible to play.

5 0

3 years ago

name the device used often to change the resistance without changing the voltage source in an electric circuit

timofeeve [1]

<em>the devices which are used to change the resistance in a circuit are called
<u>resisitors...
</u>the fact that they effect the voltage or not simply depends upon the type of resistor used in the circuit ...:)

</em>

5 0

3 years ago

Read 2 more answers

A stone is dropped from a 75-m- high building . When this stone has dropped 15 m, a second stone is thrown downward with an init

patriot [66]

Answer: -17.66 m/s or 17.66 m/s downwards

Explanation:

The decribed situation is related to vertical motion and the main equation is:

$y=y_{o}+V_{o}t-\frac{1}{2}gt^{2}$ (1)

Where:

$y=0 m$ is the final height of both stones

$y_{o}=75 m$ is the initial height of both stone s

$V_{o}$ is the initial velocity of the stone

In the case of the first stone is $V_{o1}=0 m/s$ and for the second stone $V_{o2}$ is different from zero

$t$ is the time, which is the same for both stones

$g=-9.8 m/s^{2}$ is the acceleration due to gravity

Having this clear, let's find $t$ for the first stone:

$y=y_{o}+V_{o1}t-\frac{1}{2}gt^{2}$ (2)

$0=y_{o}+0-\frac{1}{2}gt^{2}$ (3)

Isolating $t$ :

$t=\sqrt{\frac{-2y_{o}}{g}}$ (4)

$t=\sqrt{\frac{-2(75 m)}{-9.8 m/s^{2}}}$ (5)

$t=3.912 s$ (6)

Now we have to use this time to find $V_{o2}$ :

$0=y_{o}+V_{o2}t-\frac{1}{2}gt^{2}$ (7)

Isolating $V_{o2}$ :

$V_{o2}=-\frac{y_{o}}{t} - \frac{gt}{2}$ (8)

$V_{o2}=-\frac{75 m}{3.912 s} - \frac{(-9.8 m/s^{2})(3.912)}{2}$ (9)

Finally:

$V_{o2}=-17.633 m/s$ (10) The negative sign indicates the direction of the initial velocity is vertically down

6 0

3 years ago

What meteorological factor is causing the ash from the volcano to move in the direction of the arrow

PSYCHO15rus [73]

Seventeen because Seven plus seven equals fourteen

5 0

3 years ago

Can someone please help me!

Dimas [21]

Hello there!

The correct answer is 7.24

See picture below for the steps!

As always, I am here to help!

4 0

3 years ago