Answer:
5.73kg
Explanation:
Given data
Height = 8m
Potential Energy = 450J
Required
The mass of the object
From the following expression
PE=mgh
we can substitute g= 9.81m/s^2 and the other parameters to get mass m
450= m*9.81*8
450= m* 78.48
m= 450/78.48
m= 5.73kg
Hence the mass is 5.73kg
