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Len [333]
3 years ago
13

red{☣question}" alt=" \large \bold \red{☣question}" align="absmiddle" class="latex-formula">
A stone is thrown horizontally from the top of the Cliff. It strikes the ground in 3 seconds at an angle of 45° with the horizontal. Determine the height of the tower and the speed of its projection?

\large \bold \red{✒dont \: spam}
​
Physics
2 answers:
Setler79 [48]3 years ago
5 0

Answer:

<em>Given :        uy=0                    ay=g=9.8m/s2</em>

<em>Given :        uy=0                    ay=g=9.8m/s2Let the projectile's initial velocity be  u.</em>

<em>Given :        uy=0                    ay=g=9.8m/s2Let the projectile's initial velocity be  u.Time of flight      T=3  s             (given)</em>

<em>Given :        uy=0                    ay=g=9.8m/s2Let the projectile's initial velocity be  u.Time of flight      T=3  s             (given)Using         T=g2h                     ⟹h=2gT2</em>

<em>Given :        uy=0                    ay=g=9.8m/s2Let the projectile's initial velocity be  u.Time of flight      T=3  s             (given)Using         T=g2h                     ⟹h=2gT2∴   h=29.8×32=44.1 m</em>

<em>Given :        uy=0                    ay=g=9.8m/s2Let the projectile's initial velocity be  u.Time of flight      T=3  s             (given)Using         T=g2h                     ⟹h=2gT2∴   h=29.8×32=44.1 mx direction :      ax=0             ⟹Vx=u</em>

<em>Given :        uy=0                    ay=g=9.8m/s2Let the projectile's initial velocity be  u.Time of flight      T=3  s             (given)Using         T=g2h                     ⟹h=2gT2∴   h=29.8×32=44.1 mx direction :      ax=0             ⟹Vx=uy direction :     Vy=uy+ayT</em>

<em>Given :        uy=0                    ay=g=9.8m/s2Let the projectile's initial velocity be  u.Time of flight      T=3  s             (given)Using         T=g2h                     ⟹h=2gT2∴   h=29.8×32=44.1 mx direction :      ax=0             ⟹Vx=uy direction :     Vy=uy+ayT∴   Vy=0+9.8×3=29.4m/s</em>

<em>Given :        uy=0                    ay=g=9.8m/s2Let the projectile's initial velocity be  u.Time of flight      T=3  s             (given)Using         T=g2h                     ⟹h=2gT2∴   h=29.8×32=44.1 mx direction :      ax=0             ⟹Vx=uy direction :     Vy=uy+ayT∴   Vy=0+9.8×3=29.4m/sAlso       VxVy=tan45o=1</em>

<em>Given :        uy=0                    ay=g=9.8m/s2Let the projectile's initial velocity be  u.Time of flight      T=3  s             (given)Using         T=g2h                     ⟹h=2gT2∴   h=29.8×32=44.1 mx direction :      ax=0             ⟹Vx=uy direction :     Vy=uy+ayT∴   Vy=0+9.8×3=29.4m/sAlso       VxVy=tan45o=1⟹     Vx=Vy=29.4  m/s</em>

<em>Given :        uy=0                    ay=g=9.8m/s2Let the projectile's initial velocity be  u.Time of flight      T=3  s             (given)Using         T=g2h                     ⟹h=2gT2∴   h=29.8×32=44.1 mx direction :      ax=0             ⟹Vx=uy direction :     Vy=uy+ayT∴   Vy=0+9.8×3=29.4m/sAlso       VxVy=tan45o=1⟹     Vx=Vy=29.4  m/sThus initial speed of the projectile    u=Vx=29.4m/</em>

<em>L</em><em>U</em><em>V</em><em>,</em>

<em>A</em><em>R</em><em>I</em><em>A</em><em>❤</em>

Sati [7]3 years ago
4 0

Answer:

The height of the tower = 45 m

The speed of its projection = 30 m/s

Explanation:

Let g = 10 m/s²

( The answer with explanation is in the attached photo )

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