An approach path for an aircraft landing is shown in the figure and satisfies the following conditions: (i) The cruising altitude is h when descent starts at a horizontal distance l from touchdown at the origin. (ii) The pilot must maintain a constant horizontal speed v throughout descent. (iii) The absolute value of the vertical acceleration should not exceed a constant k (which is much less than the acceleration due to gravity). 1. Find a cubic polynomial P ( x ) = a x 3 + b x 2 + c x + d that satisfies condition (i) by imposing suitable conditions on P ( x ) and P ′ ( x ) at the start of descent and at touchdown.
An approach path for an aircraft landing is shown in the figure and satisfies the following conditions: (i) The cruising altitude is h when descent starts at a horizontal distance l from touchdown at the origin. (ii) The pilot must maintain a constant horizontal speed v throughout descent. (iii) The absolute value of the vertical acceleration should not exceed a constant k (which is much less than the acceleration due to gravity). 1. Find a cubic polynomial P ( x ) = a x 3 + b x 2 + c x + d that satisfies condition (i) by imposing suitable conditions on P ( x ) and P ′ ( x ) at the start of descent and at touchdown.
Solution Summary: The author analyzes the cubic polynomial P(x)-2hl3x
An approach path for an aircraft landing is shown in the figure and satisfies the following conditions:
(i) The cruising altitude is
h
when descent starts at a horizontal distance
l
from touchdown at the origin.
(ii) The pilot must maintain a constant horizontal speed
v
throughout descent.
(iii) The absolute value of the vertical acceleration should not exceed a constant
k
(which is much less than the acceleration due to gravity).
1. Find a cubic polynomial
P
(
x
)
=
a
x
3
+
b
x
2
+
c
x
+
d
that satisfies condition (i) by imposing suitable conditions on
P
(
x
)
and
P
′
(
x
)
at the start of descent and at touchdown.
j)
f) lim
x+x ex
g) lim Inx
h) lim x-5
i) lim arctan x
x700
lim arctanx
811x
4. Evaluate the following integrals. Show your work.
a)
-x
b) f₁²x²/2 + x² dx
c) fe³xdx
d) [2 cos(5x) dx
e) √
35x6
3+5x7
dx
3
g) reve
√ dt
h) fx (x-5) 10 dx
dt
1+12
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