please help me with drag forces?
Part A and B is done. I just need help wit
part E F G and H
e. Drag force F = 566N = -b
= 120 m/s const.
b = -566/120 = -4.72 N-s/m
time const = m/b = 100/4.72 = 21.19
f. at t=0 x = 120 m/s and vy =0
velocity in x -direction changes as exp(-t/) drag force is the only force opposing the motion in x- direction
t =5 x = 120 *exp(-5/21.19) = 94.77 m/s
t = 15 = 120 exp(-15/21.19) = 59.12 m/s
t = 30 = 120 exp(-30/21.19) = 29.13 m/s
in vertical direction there is gain in vel due to gravity and loss due to drag force
v(t) = g(1-exp(-t/) )
t = 0 y = 0
t =5 = 9.8*21.19 (1- exp(-5/21.19) ) = 43.65 m/s
t = 15 = 9.8*21.19 (1- exp(-15/21.19) ) = 105.35 m/s
t =30 = 9.8*21.19 (1- exp(-30/21.19) ) = 157.25 m/s
g)
F = D v2 = 566 N
D = 566 /1202 = 4.72
at terminal speed the sphere false with const vel. no external force
mg = D 2
= (100*9.8/4.72)1/2 = 14.41 m/s
please help me with drag forces? Part A and B is done. I just need help...
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