Question

a watermelon suspended in the air at 20 m and has a potential energy of 1783.6 J calculate the mass of the water in kg to one decimal place

Answer 1

9.1 kg

Step-by-step explanation:

Potential energy of an object at a height of h meters and mass m is given by
PE = mgh Joules

where

m = mass of the object in kg
h = height in meters

g= gravitational acceleration constant = 9.81 m/s²

Given PE = 1783.6 J

h = 20 m

1783.6 = m x 9.81 x 20

1783.6 = 196.2 m

m = 1783.6 /196.2

= 9.09 kg