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jeka94
4 years ago
7

Which direction is the force of gravity on earth

Physics
2 answers:
MissTica4 years ago
7 0

Answer:

It is toward the center

Explanation:

lara31 [8.8K]4 years ago
4 0
The force of gravity on earth is towards the center of it
In the downward direction
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Only very massive stars will go through a supernova stage, causing the outer layer to explode away and the core to collapse in on itself, becoming very dense.

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A car starts from rest at a stop light and reaches 20m/s in 3.5s. Determine the acceleration of the car
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Problem 10.32
Mashcka [7]

Answer : \alpha = -240\ rad/s^{2} south

Explanation :

Given that,

Force = 200 N

Length = 2.00 m

Mass = 5.00 kg

We know that , the  formula of the angular acceleration

\alpha = \dfrac{\tau}{I}\ rad/s^{2}

We know the moment of inertia of rod

I = \dfrac{ML^{2}}{12}

Now, the torque is

\tau = F\times r

The angular acceleration

\alpha = \dfrac{F\times r\times12}{ML^{2}}

\alpha = \dfrac{((200\ N\times-1\ m) + (-200\ N)\times(1\ m))\times12}{5\ kg\times2\ m\times2\ m}

\alpha = \dfrac{-400Nm\times12}{5kg\times4m^{2}}

\alpha = -240\ rad/s^{2}  

Negative sign represent of south direction.    

Hence, this is the required solution.


7 0
4 years ago
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An artillery shell is fired at a target 200 m above the ground. When the shell is 100 m in the air, it has a speed of 100 m/s. W
Marat540 [252]

Explanation:

Below is an attachment containing the solution.

3 0
4 years ago
If f(x) = -x2+x-1 then value of f(f(2)) is
qaws [65]

Answer:

<u>-13</u>

Explanation:

<u>Function</u>

  • f(x) = -x² + x - 1

<u>Solving</u>

  • Substitute 2 in place of x
  • f(2) = -(2)² + 2 - 1
  • f(2) = -4 + 2 - 1
  • f(2) = -3
  • f(f(2)) = f(-3)
  • f(-3) = -(-3)² - 3 - 1
  • f(-3) = -9 - 3 - 1
  • f(f(2)) = <u>-13</u>
6 0
2 years ago
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