this point is her center of mass at the following times? (Ighore the A gymnast j
ID: 1585130 • Letter: T
Question
this point is her center of mass at the following times? (Ighore the A gymnast jumps straight up, with her center of mass moving at 3.79 mys as effects of air resistance, and assume the initial height of her center of mass is aty0.) 0.100 300 My Notes Ask Your T An attacker at the base of a cestle wall 3.75 m high thiows a rock straight up with speed 4:00 m/s from a height of 1 40 m above the ground (a) will the rock reach the top tht wat? b If so, what is its speed at the top? If not, what initial speed must it have to reach the top? m/s (e) Find the change in speed of a rock thrown straight down from the top of the wall st an initial speed of 4.oo m/'s and moving between the same two pots (d) Dses the change in speed of the downward maving rock agree with the magnitude of the speed change of the rock moving upward between the same elevations?Explanation / Answer
As per chegg guide lines I am workig first problem, kindly post remaining question in the next post
Apply kinematic equation
yf= yi + vit + 1/2 at^2
= 0+ (3.79) t+ 1/2 ( -9.8) t^2
for t = 0.1 s
yf = (3.79) (0.1)+ 1/2 ( -9.8) (0.1)^2
=0.33 m
for t = 0.2 s
yf = (3.79) (0.2)+ 1/2 ( -9.8) (0.2)^2
=0.562 m
for t = 0.3 s
yf = (3.79) (0.3)+ 1/2 ( -9.8) (0.3)^2
=0.696 m
for t = 0.5s
yf = (3.79) (0.5)+ 1/2 ( -9.8) (0.5)^2
=0.67 m
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