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Nookie1986 [14]
3 years ago
10

A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof 2.0 s later. You ma

y ignore air resistance. If the height of the building is 30 m, what must the initial speed be of the first ball if both balls are to hit the ground at the same time
Physics
1 answer:
malfutka [58]3 years ago
3 0

Answer:

4.9 m/s

Hope this helps! c:

Explanation:

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nirvana33 [79]

Answer:

m₁ / m₂ = 1.3

Explanation:

We can work this problem with the moment, the system is formed by the two particles

The moment is conserved, to simulate the system the particles initially move with a moment and suppose a shock where the particular that, without speed, this determines that if you center, you should be stationary, which creates a moment equal to zero

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    m₁ / m₂ = -v₂ / v₁

    m₁ / m₂=  - (-6.2) / 4.7

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Another way to solve this exercise is to use the mass center relationship

    Xcm = 1/M    (m₁ x₁ + m₂ x₂)

We derive from time

   Vcm = 1/M   (m₁ v₁ + m₂v₂)

As they say the velocity of the center of zero masses

    0 = 1/M   (m₁ v₁ + m₂v₂)

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........................................................................................

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Explanation:

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So if you drive at 80.73 mph you will get a ticket for speeding over the limit.

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