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Levart [38]
3 years ago
13

A diver is on a board 1.80 m above

Physics
2 answers:
Virty [35]3 years ago
8 0

Answer:

v = 6.95 m/s

Explanation:

Given that,

A diver is on a board 1.80 m above  the water, s = 1.8 m

The initial speed of the diver, u = 3.62 m/s

Let v is the speed with which she hit the water. It will move under the action of gravity. Using the equation of motion as follows :

v^2-u^2=2gs\\\\v=\sqrt{u^2+2gs} \\\\v=\sqrt{(3.62)^2+2(9.8)(1.8)} \\\\v=6.95\ m/s

So, she will hit the water with a speed of 6.95 m/s.

love history [14]3 years ago
4 0

Answer:

6.95

Explanation:

Acellus

Correct

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Answer True or False to each case. Coulomb's law states that the force between static charges Q1 and Q2 is K Q1Q2/r2 where K is
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The wheels of a wagon can be approximated as the combination of a thin outer hoop, of radius rh = 0.156 m and mass 5.65 kg, and
Kay [80]

Answer:

R = 0.237 m

Explanation:

To realize this problem we must calculate the moment of inertia of the wheel formed by a thin circular ring plus the two bars with an axis that passes through its center.

The moments of inertia of the bodies are additive quantities whereby we can add the mounts inertia of the ring and the two bars.

Moment of inertia ring           I1 = MR²

Moment of inertia bar            I2 = 1/12 ML²

Moment of inertia disk          I3 = ½ mR²

Let's calculate the moment of inertia of the wheel

    I = I1 + 2 I2

    I = MR² + 2 1/12 ML²

The length of the bar is ring diameter

    L = 2R

    I = 5.65 0.156² + 1/6 9.95 (2 0.156)²

    I = 0.1375 + 0.1614

    I = 0.2989 kg m²

This is the same moment of inertia of the solid disk,

Disk

     I3 = I

     I3 = ½ MR²

They give us disk density

     ρ = M / V

    M =  ρ V

    M =  ρ (pi R² e)

Done is the thickness of the disc, in general it is e= 1 cm = 0.01 m

Let's replace

       I3 = ½ ( ρ π R²) R²

       I3 = ½  ρ π e R⁴

       R⁴ = 2 I3 / ( ρ π e)

       R = ( 2  I3 / ( ρ π e)

)^{1/4}

     

      R⁴ = 2 0.2989 / (5990 π 0.01)

      R = 0.237 m

6 0
2 years ago
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