Potential energy (PE) = m x g x h
Where:
m= mass = ?
g = gravity =9.8 m/s^2
h= height = 2.5 meters
PE= 4.73 J
Replacing:
4.73 = m x 9.8 x 2.5
4.73 / (9.8 x 2.5) = m
m = 0.19 kg
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