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Irina18 [472]
3 years ago
7

A penny is dropped off the top of the Stratosphere from rest and falls freely with the

Physics
1 answer:
Roman55 [17]3 years ago
3 0

Answer:

S = 122.5m

Explanation:

Given the following data;

Acceleration due to gravity = 9.8m/s²

Time, t = 5 seconds

Since it's a free fall, initial velocity, u = 0

To find the displacement, we would use the second equation of motion given by the formula;

S = ut + \frac {1}{2}at^{2}

Where;

  • S represents the displacement or height measured in meters.
  • u represents the initial velocity measured in meters per seconds.
  • t represents the time measured in seconds.
  • a represents acceleration measured in meters per seconds square.

Substituting into the equation, we have;

S = 0*5 + \frac {1}{2}*(9.8)*5^{2}

S = 0 + 4.9*25

S = 122.5m.

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Answer:

force is decreased by a factor of 4.

Explanation:

According to the Newton's law of gravitation, the force of gravitation between the two object is inversely proportional to the square of distance between them. Now the distance is doubled, so the force between the two objects becomes one forth.

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3 years ago
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Answer:

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Explanation:

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The moment of inertia of a point mass about an arbitrary point is given by:

I = mr²

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I = m(3ℓ/2)² = 9mℓ²/4

The total moment of inertia of the system is

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