A rock is thrown upward with a velocity of 23 meters per second from the top of a 25 meter high cliff, and it misses the cliff on the way back down. when will the rock be 11 meters from the water, below

Question

Physics

Gideon Lam

22 June, 14:58

A rock is thrown upward with a velocity of 23 meters per second from the top of a 25 meter high cliff, and it misses the cliff on the way back down. when will the rock be 11 meters from the water, below

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Johnathon Rollins · Answer 1

Vf=vi+at

-23m/s=23m/s-9.8m/s^2 (t)

t1 from throwing up back to starting position t1=4.693s

Delta (x) = vi (t) +.5a (t^2)

25-11=14

-14m=-23m/s (t) - 4.8m/s^s (t^2)

t2 is from 25m to 11 m t2=.546s

Total time = 5.239s