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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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Answer:

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Explanation:

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$d_1$ = Initial diameter = 1.5 cm

$d_2$ = Final diameter

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$P_1=P_2+\rho gh\\\Rightarrow P_1=101325+1000\times 9.81\times 40\\\Rightarrow P_1=493725\ Pa$

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$\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}\\\Rightarrow \dfrac{P_1\dfrac{4}{3\times8}\pi d_1^3}{T_1}=\dfrac{P_2\dfrac{4}{3\times8}\pi d_2^3}{T_2}\\\Rightarrow \dfrac{P_1d_1^3}{T_1}=\dfrac{P_2d_2^3}{T_2}\\\Rightarrow d_2=(\dfrac{P_1d_1^3T_2}{P_2T_1})^{\dfrac{1}{3}}\\\Rightarrow d_2=(\dfrac{493725\times 0.015^3\times (20+273.15)}{101325\times (10+273.15)})^{\dfrac{1}{3}}\\\Rightarrow d_2=0.0257259766982\ m$

The diameter of the bubble is 0.0257259766982 m

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