mechanical energy Flashcards
what is mechanical energy
it is the sum of an objects kinetic energy and gravitational potential energy
what is the formula
Emech = Ek + Ep
Emech = 1/2mv2 + mgh
what is the law of mechanical energy
’’ in an isolated system , the total mechanical energy of an object remains constant ‘’
what is an isolated system
one which there are no external forces acting on the object
no friction
no tension
no applied forces
hat is the law of conservation of energy
’’ energy cannot be created nor destroyed but converted from one form to another
what happened one an object is falling
h decreases
Ep decreases
v increases
Ek increases
Ep is covered to Ek
what happens when an object is thrown into the air
v decreases
Ek decreases
h increases
Ep increases
Ek is converted to Ep
