Thought experiment: we claim that the air track is frictionless, but this is not entirely true. how would our newton's 2nd law models (eq. 1 and eq. 3) of the two systems studied in this lab change if we were to account for the force of friction acting on the glider as it travels across the track? draw force diagrams to you. use f to denote the mathematical term for the force of friction. ww hence a fixed force (f = mhg). mass will be added to the glider, so that: f=mng = (m + mn)a (eq. 1) resulting in: fmg sin 0= ma (eq. 3)

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Sound is a disturbance that travels through a medium as a