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A body is projected vertically upward from top of the towrr it takes 2s to move up and 4s to reach ground find the height of the tower |
| Answer» 60 mExplaination:when stone is projected VERTICALLY UPWARDS,u=?a= -gv=0t=2 secHmax=?a=v-u/tsince a= -g,-g= -u/t-10= -u/2minus cancelled on both sides,u=20 m/sHmax=u²/2g = 20 mwhen stone is FALLING freely,u=0t=4 secH=(20+x) mhere, x is the height of the tower.a=gH=1/2gt² =1/2×10×16 =80 m(20+x)=80x=60 mtherefore,the height of the tower is 60 mpleease mark as BRAINLIEST:) | |