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Digiron [165]
3 years ago
13

Two people are standing on a 2.50-m-long platform, one at each end. The platform floats parallel to the ground on a cushion of a

ir, like a hovercraft. The two people, the platform and a 3.63-kg ball are all initially at rest. One person throws the 3.63-kg ball to the other, who catches it. The ball travels nearly horizontally. Excluding the ball, the total mass of the platform and people is 198 kg. Because of the throw, this 198-kg mass recoils. How far does the platform move before coming to rest again?
Physics
1 answer:
trasher [3.6K]3 years ago
6 0

Answer:

The platform move before coming to rest again 0.045 m far

Explanation:

Given

Ball is in motion

M (Platform mass + 2 people mass)

V (recoil velocity of the platform)

m (ball mass)

v (velocity ball)

MV + mv = 0

Distance of the platform movement is

t (time that the ball is in the air)

x = Vt

t = \frac{L}{v - V}

Knowing the platform and the ball are moving while the ball is in the air

x = \frac{V}{v - V} * L

Also knowing that

\frac{V}{v} = \frac{-m}{M}

This way,

x = ((\frac{V}{v}) * L) / (1 - \frac{V}{v}) = -\frac{m*L}{M + m} = -\frac{3.63 kg * 2.50 m}{198 kg + 3.63 kg}  = -0.045 m

The minus sign means the displacement of the platform is in opposite direction to the displacement of the ball.

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Answer:

B) x^2+6x+8

Explanation:

x-4 | x^3+2x^2-16x-32

    -  x^3-4x^2             <-- (x-4)(x^2)

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              6x^2-16x-32

           -  6x^2-24x     <-- (x-4)(6x)

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This means the answer is B) x^2+6x+8

             

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In the lab downstairs physics majors use a rotating mirror to measure the speed of light within a few percent of the actual valu
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<h3>What is angular velocity?</h3>

Angular velocity is the ratio of the angle turned to the time taken.

The kinematic equation for angular velocity are presented as follows;

ω = ω₀ + α·t

θ = θ₀ + ω₀·t + 0.5·α·t²

Where;

θ₀ = The initial angle turned = 0

ω₀ = The initial angular velocity of the mirrors = 115 rad/s clockwise

α = The angular acceleration = (115  - (-115))rad/s/(85 s) = -46/17 m/s²

t = The duration of the motion;

When the angular velocity, ω is zero, we get;

0 = 115 - 46/17·t

t = 85/2

Which indicates;

θ = 0 + 115× (85/2) + 0.5×(46/17) ×(85/2)² = 7331.25

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The mirrors would have turned through approximately 1166.8 revolutions when the angular gets to zero

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brainly.com/question/13014974

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1 year ago
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BaF2

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since you got the valence numbers just do the scissors move where you:

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5 0
2 years ago
n electromagnetic wave in vacuum has an electric field amplitude of 611 V/m. Calculate the amplitude of the corresponding magnet
enot [183]

Answer:

The  corresponding  magnetic field is  

Explanation:

From the question we are told that

    The electric field amplitude is  E_o   =  611\  V/m

   

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Since 1  T  is  equivalent to  V  m^{-2} \cdot  s

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Answer:

30.5

Explanation:

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