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jekas [21]
3 years ago
9

What is the magnitude of the gravitational force the apple exerts on earth?

Physics
1 answer:
blagie [28]3 years ago
4 0
It's downward vector from the centre of apple in the direction to the centre of the Earth.
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a student holds a 3.0kg mass in each hand while sitting on a rotating stool. when his arms are extended horizontally, the masses
sweet-ann [11.9K]

Answer:

Explanation:

Due to change in the position of 3 kg mass , the moment of inertia of the system changes , due to which angular speed changes  . We shall apply conservation of angular momentum , because no external torque is acting .

Initial moment of inertia I₁ = M R² = 3  x 1 ² = 3 kg m²

Final moment of inertia I₂ = M R² = 3  x .3 ² = 0.27  kg m²

Applying law of conservation of angular momentum

I₁ ω₁ = I₂ ω₂

Putting the values ,

3 x .75 = .27 x ω₂

ω₂ = 8.33 rad / s

New angular speed = 8.33 rad /s .

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The work changes her potential energy.

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3 years ago
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The answer is ball D

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Answer:

<u>Conventions used in SI to indicate units are as follows:</u>

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5 0
3 years ago
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