The percentage of the initial potential energy that has been converted into heat is 18.07%.
What is potential energy?
Potential energy can be defined as the energy of a body due to its position in the gravitational field.
To calculate the percentage of the initial potential energy that has been converted into heat, we use the formula below.
Formula:
- H(%) = [(P.E-K.E)/P.E]100............... Equation 1
Where:
- H = Energy converted to heat
- P.E = Potential energy
- K.E = Kinetic energy.
But,
- P.E = mgh........... Equation 2
From the diagram,
- m = mass = 0.5 kg
- h = 7 cm = 0.07 m
- g = 9.8 m/s²
Substitute these values above into equation 2
- P.E = (0.5×9.8×0.07)
- P.E = 0.343 J
Also From the diagram,
Substitute these values into equation 1
- H(%) = [(0.343-0.281)/0.343]100
- H(%) = 18.07%.
Hence, the percentage of the initial potential energy that has been converted into heat is 18.07%.
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