Consider a population P(t) satisfying the logistic equation dP = aP – bP2 where B = aP is dt - the time rate at which births occur and D = bP² is the rate at which deaths occur. If initial population is P(0) = Po and B, biths per month and Do deaths per month are occuring at BoPo time t = 0, show that the limiting population is M = Do %3D

Advanced Engineering Mathematics
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Chapter2: Second-order Linear Odes
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1. Consider a population P(t) satisfying the logistic equation
dP
= aP – bP2 where B = aP is
dt
the time rate at which births occur and D = bP2 is the rate at which deaths occur. If initial
population is P(0) = Po and Bọ biths per month and Do deaths per month are occuring at
BoPo
time t = 0, show that the limiting population is M =
Do
2. A man with a parachute jumps out of a hovering helicopter at height H. During the fall, the
man's drag coefficient is k (with closed parachute) and nk (with open parachute) and air
reistant is taken as proportional to velocity. The total weight of the man and his parachute is
m. Take the initial velocity when he jumped to be zero. Gravitatioanl constant is g. Find the
best time for the man to open his parachute after he leaves the helicopter for the quickest fall
and yet "soft" landing at touchdown speed < vo.
FR
FG
Figure 1: The Jumper Model
Transcribed Image Text:1. Consider a population P(t) satisfying the logistic equation dP = aP – bP2 where B = aP is dt the time rate at which births occur and D = bP2 is the rate at which deaths occur. If initial population is P(0) = Po and Bọ biths per month and Do deaths per month are occuring at BoPo time t = 0, show that the limiting population is M = Do 2. A man with a parachute jumps out of a hovering helicopter at height H. During the fall, the man's drag coefficient is k (with closed parachute) and nk (with open parachute) and air reistant is taken as proportional to velocity. The total weight of the man and his parachute is m. Take the initial velocity when he jumped to be zero. Gravitatioanl constant is g. Find the best time for the man to open his parachute after he leaves the helicopter for the quickest fall and yet "soft" landing at touchdown speed < vo. FR FG Figure 1: The Jumper Model
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