RRB Group D 24-Sep-2018 Shift 1 Solved Paper

Question : 27 of 100

Marks: +1, -0

A mobile phone was dropped from a balcony. If the mass of the mobile phone is

0.5 \ { kg}

and height from where mobile phone was dropped is 100 metre,

\ {g}=10 \ { m} \/{s}^{2}

then the potential energy of mobile phone is

Solution:

{U}={mgh}=0.5 ×10 \×100

=500 \ { J}

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