Ep= mgh
Ep = 40 x 9.8 x 10
Ep = 3920J
Ep = 3900J (2sf)
Force applied by the machine to over come resistance
Work can be defined as the energy transferred from a body to its sorroundings, the energy spent to move a body, or the energy you need to alter a charged particle, so no energy, no work; thus, the statement is true.
Answer:
Interference of light
Diffraction of light
Polarization of light
Reflection of light
all show the wave nature of light.