una partícula viaja a lo largo de dos semicirculares de radio 8m como se muestra en la figura . si sale de reposo desde un punto a y su velocidad se ingrementa de 2m/s detemine a)el tiempo que dura en llega b

step-by-step explanation:

options

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

step-by-step explanation: