Version 3 1) Ballis at the top of a building Ball 2 is at the bottom of the building of height H. Ball 2 is
thrown up with a speed of 2V and Bal 1 is thrown down at a speed of 3V. Use the bottom to be
your reference level
Al Find an expression for the time at which they meet in terms of H and V,
B) Find the velocity at which they pass each other in terms of Vugh.
Find the height above the ground they meet in terms of Vg, h.
D) Plot graphs of attacceleration vs timel, -tſvelocity vs time), and x-t{position vs time), show
they intercept of the at graph and the x-t graph, show the y intercept and the slope of the
position is time graph atte.

idk

Explanation: idk

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.