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TEA [102]
3 years ago
10

Which of the following illustrates an increase in potential energy? Group of answer choices a wind-up toy winding down a person

climbs a set of stairs an apple dropping from a tree a firecracker explodes
Physics
1 answer:
horrorfan [7]3 years ago
7 0

Answer:

A person climbs a set of stairs

Explanation:

Potential energy is said to be possessed by an object due to its position. As the height from the ground level increase, the potential energy increases. It is calculated by the below formula as :

P = mgh

Out of the given options, the option that illustrates an increase in potential energy is option (b) i.e. a person climbs a set of stairs. As he steps one stair, its position from ground increases. It means its potential energy increases.

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Explanation:

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3 years ago
Define the Element of Art, value. If you were using a pencil, how would you create a darker value?
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You would create a darker value if you shaded it, shading it makes it darker.

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3 years ago
Most of the mass of the milky way exists in the form of.
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Answer: Dark matter.

Explanation: Hope it helps :)

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2 years ago
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What happens at a convergent boundary?
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A 5 kg object near Earth's surface is released from rest such that it falls a distance of 10 m. After the object falls 10 m, it
makkiz [27]

Answer:D

Explanation:

Given

mass of object m=5 kg

Distance traveled h=10 m

velocity acquired v=12 m/s

conserving Energy at the moment when object start falling and when it gains 12 m/s velocity

Initial Energy=mgh=5\times 9.8\times 10=490 J

Final Energy=\frac{1}{2}mv^2+W_{f}

=\frac{1}{2}\cdot 5\cdot 12^2+W_{f}

where W_{f} is friction work if any

490=360+W_{f}

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Since Friction is Present therefore it is a case of Open system and net external Force is zero

An open system is a system where exchange of energy and mass is allowed and Friction is acting on the object shows that system is Open .

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