derive the formula T = nBIA cos(theta)
I can only think of equating F = nBIL and F = T/d to get nBIL = T/d, T = nBILd (and L*d = Area of rectangle/square) and you just add in the cos theta as the angle between the plane of the coil and the magnetic field... something like that...
Compare the inertial and non-inertial frame of references. (3)
I can't make a table on here so I'll just do dot points:
- Inertial frames are non-accelerating while non-inertial frames are accelerating.
- Inertial frames obey Newton's laws of classical mechanics while non-inertial frames do not.
- Inertial frames are accounted for by Einstein's special theory of relativity while non-inertial frames are accounted for by Einstein's general theory of relativity.
- Inertial frames obey Newton's first law and non-inertial frames have fictitious forces to explain motion caused by no net force, e.g. centrifugal force.
Should be enough for 3 marks I think...