Energy Transfer and Kinetic Energy
Define:
Energy Transfer:
Give two examples of kinetic energy transfer?
How does kinetic energy transfer between objects?
Using Kinetic and Potential Energy
In a hydroelectric dam, where is kinetic energy the highest? Where is potential energy the highest?
Define:
Mechanical energy
Thermal energy
What is the formula for potential energy?
What is the formula for kinetic energy?
Give two types of conservative forces:
Give two types of non-conservative forces
Calculate the KE of an object with a mass of 0.5 kg and a velocity of 2.0 m/s.
Calculate the PE of an object with a mass of 0.5 kg located on a table with a height of 1 meter. (Remember g= 9.8 m/s2)
Energy Transfer: The movement of energy from one object to another.
Two examples of kinetic energy transfer: A moving billiard ball striking another billiard ball, a person throwing a baseball.
Kinetic energy transfers between objects when one object pushes or applies a force to another object, causing it to move.
In a hydroelectric dam, kinetic energy is highest in the flowing water before it reaches the turbine, and potential energy is highest in the water held in the reservoir at a higher elevation.
Mechanical energy: The sum of potential and kinetic energy in a system.
Thermal energy: The energy associated with the heat of an object or system.
Potential energy formula: PE = mgh (mass x gravity x height)
Kinetic energy formula: KE = 0.5mv^2 (0.5 x mass x velocity^2)
Two types of conservative forces: Gravity and elastic forces.
Two types of non-conservative forces: Friction and air resistance.
Calculating kinetic energy: KE = 0.5 * 0.5 kg * (2.0 m/s)^2 = 0.5 J
Calculating potential energy: PE = 0.5 kg * 9.8 m/s^2 * 1 m = 4.9 J