None of the choices is correct.
== The Earth's radius is 6,371 km. That's how far you are from the center of the Earth when you're on the ground.
== The acceleration of gravity on the ground is 9.8 m/s² .
== The acceleration of gravity varies inversely as the square of the distance from the center of the Earth. So, at 7,200 km from the center, it's
(9.8 m/s²) · (6371km/7200km)² .
Stuffing this through your cakulator, you'll get <em>7.67 m/s²</em> .
Just like mass, energy, linear momentum, and electric charge, angular momentum is also conserved.
The wheel has angular momentum. I don't remember whether it's
up or down (right-hand or left-hand rule), but it's consistent with
counterclockwise rotation as viewed from above.
When you grab the wheel and stop it from spinning (relative to you),
that angular momentum has to go somewhere.
As I see it, the angular momentum transfers through you as a temporary
axis of rotation, and eventually to the merry-go-round. Finally, all the mass
of (merry-go-round) + (you) + (wheel) is rotating around the big common
axis, counterclockwise as viewed from above, and with the magnitude
that was originally all concentrated in the wheel.
Answer:
Explanation:
F₁ = Force on one side of the jack
A₁ = Area of cross-section of one side of the jack
F₂ = Force on second side of the jack
A₂ = Area of cross-section of second side of the jack = 2 A₁
Using pascal's law
The vertical speed of the rod varies inversely as the rotational speed for a given number of complete rotations
The equation that gives the vertical velocity, v₀ is 
Reason:
<em>From a similar question, the given parameters appear to be correctly given as follows;</em>
<em>The vertical speed of the rod = v₀</em>
<em>Angular velocity of the = ω₀</em>
Required;
The value of, v₀, so that the rod has made exactly, <em>n</em>, number of turns when it returns to his hand
Where;
n = An integer
Solution;
The time the rod spends in the air is given as follows;
Where;
g = Acceleration due to gravity
t = Time of motion
When the rod returns to his hand, we have, h = 0, therefore;
We have;
Therefore;
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The boiling pot of water is completely open
