Nerical Problems 8m
680 N
A load of 680 N is lifted from A to C by 500 N force
on an inclined plane as shown in the diagram.
500N
Study the diagram and calculate:
12 m
i.
Output work
ii. Input work
iii. Mechanical advantage
iv. Velocity ratio V. Efficiency
(Ans: i. 5.44x109), ii. 6x109 J, iii. 1.36, iv.1.5, v. 90.6%)
A
B.

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.