IIT JEE , AIEEE Forum - Physics , Mechanics - HCV

shyam_nair_s

Look here the loss in kinetic energy is the gain in potential energy.....so

here the gain in PE is mgH (vertical distance) which is the 0.2 (radius)

+ ).2 sinA........here A is the angle which the radius at any genereal point

makes with the radius.....so its vertical component will be 0.2 sinA

which has to be added to the radius to get the total.....vertical distance

which it will cover.....H = 0.2 + 0.2 sinA.....just imagine the radius at any

pt making angle A with the vertical then it will be very clear......

hope u got it now...