Energy of Point Object Systems Flashcards
Kinetic Energy, Potential Energy, Conservation of Energy, Power
Energy is the capacity to do ____
Energy is the capacity to do WORK
____ is the energy of motion
KINETIC ENERGY is the energy of motion
Kinetic Energy is defined as: ____
Unit: ____
Kinetic Energy is defined as: K = ½mv² (also written as KE = ½mv²)
Unit: Joules (Nm)
____ is the energy of position
POTENTIAL ENERGY is the energy of position
Gravitational Potential Energy is defined as: ____
Unit: ____
Gravitational Potential Energy is defined as: U = mgh (also written as PE = mgh)
Unit: Joules (Nm)
Elastic (Spring) Potential Energy is defined as: ____
Unit: ____
Elastic (Spring) Potential Energy is defined as: U = ½kx² (also written as PE = ½kx²)
Unit: Joules (Nm)
The law of conservation states that since the universe is an ____ the energy of the universe remains constant
The law of conservation states that since the universe is an ISOLATED SYSTEM the energy of the universe remains constant
In an isolated system there is no ____ exchange with the surroundings
In an isolated system there is no ENERGY OR MASS exchange with the surroundings
In an isolated system ____ must remain constant
In an isolated system THE SUM OF ALL ENERGY must remain constant
____ is the rate of energy change
POWER is the rate of energy change
Power is defined as: ____
Units: ____
Power is defined as: P = E/t (also written as P = W/t)
Units: Watts (J/s or Nm/s)
Instantaneous power due to force is defined as: ____
Units: ____
Instantaneous power due to force is defined as: P = Fv cosθ
Units: Watts (J/s or Nm/s)
