Friday, March 2, 2018
Conservation of Energy
CONSERVATION
OF
ENERGY
ENERGY
CONSERVATION OF Abbreviated Version: ENERGY: Energy that cannot be destroyed or created, KEi + PEi = KEf + PEf
but can adjusted from one form to another or transferred Extended Version:
from one subject to another. 1/2mv^2i+mgh=1/2mv^2f+mghf
Different units of energy:
a. SI units are measured The ampere is the SI base unit of electrical current, The candela is the SI base unit of luminous intensity, The kelvin is the SI base unit of thermodynamic temperature.
b. American units are measured in calories, joules, British thermal unit (Btu), and kilowatt- hour (kWh)
from one subject to another. 1/2mv^2i+mgh=1/2mv^2f+mghf
Different units of energy:
a. SI units are measured The ampere is the SI base unit of electrical current, The candela is the SI base unit of luminous intensity, The kelvin is the SI base unit of thermodynamic temperature.
b. American units are measured in calories, joules, British thermal unit (Btu), and kilowatt- hour (kWh)
In this video it explains energy, power and work. The Law of Conservation of Energy states that the total of energy of an isolated system will remain constant and can be conserved over time. This law means that energy can neither means can neither be created or destroyed, it can only transform to one form to another. How energy changes depends on the system. Conservative system does not let you lose energy with work?
EXAMPLE PROBLEM!!!
1. A ball that weighs 1.8kg has been dropped from the top of a house that is 2.9 meters above the ground. What is the mechanical energy, when speed of the falling ball is 4.8m/s?
KE=1/2mv^2 GPE=mgh ME= GPE + KE
1/2 x 1.8 x 4.8^2 1.8 x 10 x 2.9 = 52.2 + 20.7
= 20.75 = 52.25 = 74.95
X - GAMES LOOP
In this photo, the skater is at max height( in the green box). There is no energy being distributed,
potential or kinetic because he is not in motion.
In this photo, there is more potential energy because the skater is at the top of the loop and because he is at the top of loop, there is less kinetic energy.
In this photo, the skater is at his fastest because there is lots of built of energy that is he got from going down the ramp that is being released, this is kinetic energy. the energy that is gained is potential energy. that's why there is more Kinetic energy than potential energy.
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