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3 years ago

Write SHORT examples of Gravitational potential energy and Elastic energy

Physics

2 answers:

Nikolay [14]3 years ago

6 0

Dropping a bouncy ball and stretching a rubber ban.

gulaghasi [49]3 years ago

3 0

Answer:

Examples of a gravitational potential energy are; a flying helicopter, objects thrown up and examples of elastic energy are; an archers stretched bow, a stretched rubber band

Explanation:

We will start by giving a short definition of the two terminologies

Gravitational potential energy is the energy an object possess as a result of its position above the surface of the earth.

$E_{P}$ = mgh

where m = mass g = gravitational field strength h= height and $E_{P}$ =gravitational potential energy

Examples are; a flying helicopter, objects thrown up

Elastic energy: This occurs as a result of stretching, compressing or deforming of an object impermanently.

$E_{e}$ = $\frac{1}{2}$ ke²

where k = spring constant e=extension and $E_{e}$ =Elastic potential energy

examples of elastic energy are; an archers stretched bow, a stretched rubber band

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3 years ago

An object is (starting at rest) begins to plummet towards the earth. Assuming it is in a vacuum, how fast is the object travelin

Eva8 [605]

Answer:

–50.96

Explanation:

The following data were obtained from the question:

Initial velocity (Vᵢ) = 0 m/s

Acceleration (a) = – 9.8 m/s²

Time (t) = 5.2 s

Final velocity (Vբ) =.?

Acceleration is simply defined as the change of velocity with time. Mathematically, it is expressed as:

Acceleration (a) = Final velocity (Vբ) – Initial velocity (Vᵢ) /Time (t) =

a = (Vբ – Vᵢ) / t

With the above formula, we can determine how fast the object is traveling after 5 s as follow:

Initial velocity (Vᵢ) = 0 m/s

Acceleration (a) = – 9.8 m/s²

Time (t) = 5.2 s

Final velocity (Vբ) =.?

a = (Vբ – Vᵢ) / t

– 9.8 = (Vբ – 0) / 5.2

– 9.8 = Vբ / 5.2

Cross multiply

Vբ = –9.8 × 5.2

Vբ = –50.96 m/s

Therefore, the object is traveling at

–50.96 m/s

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3 years ago