In terms of the photoelectric effect, what is the work function of a material?
It is the work done (or energy) required to remove an electron from its surface. This information is used a lot in Einstein's Nobel prize winning Photoelectric effect experiment and theory.
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A trolley of mass 0.75kg is running along a frictionless track at a constant speed of 0.7ms-1, as the trolley passes below a mass of 0.5kg the mass drops a short vertical distance onto the trolley. Calculate the new velocity of the trolley and mass.
how do i convert from a sine angle to a cosine angle?
Resolving the forces for an object suspended on two strings.