Mechanical energy
Potential energy
Kinetic energy
(Elastic) potential energy
The energy stored by a body that is dependent its position relative to others, and the stresses within itself and other factors.
(Gravitational) potential energy
Due to its position above the earth's surface (reference point or base level)
mass x gravity x height, mgh
mass x gravity x height, mgh
energy stored due to deformation of an elastic object
spring stretching or compressing
1/2 x k * x^2
where k is spring constant
x = displacement from equilibrium
conservation of mechanical energy
PE + KE = ME
ME = PE1 + KE1 = PE2 + KE2
Cannot be destroyed or loss
cannot be created
can only be converted**
Energy of a moving object
motion
proportional to mass, speed
spring force = F = kx
polarity depends on compress (-kx) or pull (kx)
1/2 x m x v^2
Total energy never changes but can have a different level in PE or KE
measured in Joules, J
measured in Joules
Measured in Joules,J
measured in N/m
serires = 1/k(total) = 1/k1 + 1/k2+1/kn
parallel = k(total) = k1+k2+kn
Measured in , Joules, J
measured in Joules, J