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adelina 88 [10]
3 years ago
12

onsider the free body diagram. If the sum of the tension forces is equal to the force of gravity, which description BEST applies

? A) A book is at rest on a tabletop. B) A physics student rests a backpack upon one shoulder. C) A girl hangs by both hands, motionless, from a trapeze. D) A girl falls slowly to Earth while strapped to a parachute.
Physics
1 answer:
cluponka [151]3 years ago
5 0
The answer is C) A girl hangs by both hands, motionless, from a trapeze.
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A 30 kg child rides a 20 kg bicycle. Together, the child and the bicycle have a momentum of 110 kg-m/s. What is the velocity of
love history [14]

Answer:

The velocity of the boy and the bicycle is 2.2 m/s.

Explanation:

We have,

Mass of child is 30 kg and the mass of bicycle is 20 kg. The combined momentum of the child and the bicycle is 110 kg-m/s.

It is required to find the velocity of the boy and the bicycle. The momentum of an object is given in terms of mass and its velocity. So,

p=Mv

M is combined mass of child and bicycle

v=\dfrac{p}{M}\\\\v=\dfrac{110}{30+20}\\\\v=2.2\ m/s

So, the velocity of the boy and the bicycle is 2.2 m/s.

8 0
3 years ago
Collect information about working of Geyser and prepare a report
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6 0
2 years ago
Imagine that someone is sitting down to enjoy a cup of coffee or hot chocolate. Use your experiences to describe how heat flows
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Explanation:

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8 0
2 years ago
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On Earth, a spring stretches by 5.0 cm when a mass of 3.0 kg is suspended from one end.
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Answer:

Mass = 18.0 kg

Explanation:

From Hooke's law,

F = ke

where: F is the force, k is the spring constant and e is the extension.

But, F = mg

So that,

mg = ke

On the Earth, let the gravitational force be 10 m/s^{2}.

3.0 x 10 = k x 5.0

30 = 5k

⇒ k = \frac{30}{5} ................ 1

On the Moon, the gravitational force is \frac{1}{6} of that on the Earth.

m x \frac{10}{6} = k x 5.0

\frac{10m}{6} = 5k

⇒ k = \frac{10m}{30} ............. 2

Equating 1 and 2, we have;

\frac{30}{5}  = \frac{10m}{30}

m = \frac{900}{50}

    = 18.0

m = 18.0 kg

The mass required to produce the same extension on the Moon is 18 kg.

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2 years ago
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Define in own words.
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