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jeka57 [31]
4 years ago
6

Match each orbiting body to its attribute.

Physics
1 answer:
Anuta_ua [19.1K]4 years ago
5 0

Answer:

Gas Giant- atmosphere primarily made of hydrogen and helium

Asteroid-varies greatly in size from one to the next

Comet-has a characteristic glow

Meteoroid-usually burns up if it enters Earth's

Explanation:

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300N effort is applied to lift the load of 900N by using a first class lever. If the distance between the load and fulcrum is 20
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Answer:

Effort=300N

Load=900N

Load distance=20m

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Ed=(900*20)/300

Ed=1800/300

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2 years ago
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A catapult with a radial arm 3.81 m long accelerates a ball of mass 18.2 kg through a quarter circle. The ball leaves the appara
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Answer:

(a)\alpha = 53.73 m/s^2

(b)   I =428 kgm^2

(c)\tau = 428 \times 53.73  = 22996 .44Nm

Explanation:

GIVEN

mass = 18.2 kg

radial arm length = 3.81 m

velocity = 49.8 m/s

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we know using relation between linear velocity and angular velocity

\omega = \frac{v}{l}

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for  angular acceleration, use the following equation.

\omega _{f}^2 = \omega_{i}^2+2\alpha\theta

since \omega _{i} = 0

here  for one circle is 2 π radians.   therefore for one quarter of a circle is π/2 radians

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(12.99)^2 = 2\alpha(\frac{\pi }{2})

on solving

\alpha = \frac{168.74}{\pi }\\\alpha = 53.73 m/s^2

(b)

For the catapult,

moment of inertia

I = \frac{1}{2}MR^2

I = \frac{1}{2} \times 22.6\times 3.81 \times 3.81\I = 164kg m^2

For the ball,

I = MR^2

I = 18.2 \times 14.51

I = 264 kgm^2

so total moment of inertia =  428 kgm^2

(c)

\tau = I\alpha

\tau = 428 \times 53.73  = 22996 .44Nm

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