Question

a body of mass 20 kg force through a distance of 50 cm.what is loss in potential energy
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Answer 1

Given:-

• mass of the body = 20kg
• distance /height = 50cm = 0.5m
• acceleration due to gravity (g) = 9.8m/s²

To find:-

• amount of potential energy lost

Formula:-

$\longrightarrow$ $\underline{\boxed{\sf P.E = mgh}}$

here,

• P.E = potential energy
• m = mass
• g = acceleration due to gravity
• h = height

Solution:-

$\longrightarrow$ P.E = 20 × 9.8 × 0.5

$\longrightarrow$ P.E = 98 J

Additional information:-

• When An object is in rest, the energy posses by it is potential energy.

• When the object is in motion, the energy posses by it is kinetic energy. It is calculated by the following formula:-

$\longrightarrow$ $\underline{\boxed{\sf K.E = \dfrac{1}{2}mv²}}$

here,

• K.E = kinetic energy
• m = mass
• v = velocity