Posted by **Riana** on Tuesday, March 26, 2013 at 8:40pm.

Q1.a building has three alternative routes from the ground to the first floor.

i)a flight of stairs at an angle of 45 degree.

ii)a near flight ladder angle 85 degree.

iii)a long zig-zag slope at an angle of 15 degree.

what are the disadvantages and advantages of each case above.

NOte"work,energy,time,effort,height"

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