Question

A bag weighting 50grams fell from a particular height. It was discovered that the bag fell with a potential energy of 10jouls.calculate the height through which the bag has fell through

Answer 1

PE=mgh
10=50×10^-3×10×h
h=20m
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Answer 2

Heya !
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=> Potential Energy is the energy possessed by an object due to its state of rest . It is equal to the product of mass (m) , height (h) and acceleration due to gravity (g).

Expression : Pe = mgh

→Here we have ,

• Mass m = 50 gms => 1 / 20 Kg.........( 1 )

• Acceleration due to gravity => 10 m/s

• Potential Energy Pe = 10 J

• Height h = ?


=> Putting in Formula we have ,


$= > 10 = \frac{1}{20} \times 10 \times h \\ \\ = > 10 = \frac{h}{2}$

→Cross Multiplying the terms we have ,


=> H = 20 m


[ Note - we have taken acceleration due to gravity 'g' as 10 for easy calculation ]


★Hence, the height through which the ball fell is 20 m.


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