A plane heading S 21 ° E with an an air speed of 375 mph encounters a wind blowing due east at 28 mph . a. Express the velocity of the plane v p relative to the air and the velocity of the wind v w in terms of i and j. Round components to 1 decimal place. b. Find the velocity of the plane relative to the ground v g and the speed of the plane relative to the ground. Round the speed to the nearest mph. c. Find the bearing of the plane relative to the ground. Round to the nearest tenth of a degree.
A plane heading S 21 ° E with an an air speed of 375 mph encounters a wind blowing due east at 28 mph . a. Express the velocity of the plane v p relative to the air and the velocity of the wind v w in terms of i and j. Round components to 1 decimal place. b. Find the velocity of the plane relative to the ground v g and the speed of the plane relative to the ground. Round the speed to the nearest mph. c. Find the bearing of the plane relative to the ground. Round to the nearest tenth of a degree.
A plane heading
S
21
°
E
with an an air speed of
375
mph
encounters a wind blowing due east at
28
mph
.
a. Express the velocity of the plane
v
p
relative to the air and the velocity of the wind
v
w
in terms of i and j. Round components to 1 decimal place.
b. Find the velocity of the plane relative to the ground
v
g
and the speed of the plane relative to the ground. Round the speed to the nearest mph.
c. Find the bearing of the plane relative to the ground. Round to the nearest tenth of a degree.
1. Show that the vector field
F(x, y, z)
=
(2x sin ye³)ix² cos yj + (3xe³ +5)k
satisfies the necessary conditions for a conservative vector field, and find a potential function for
F.
1. Newton's Law of Gravitation (an example of an inverse square law) states that the magnitude
of the gravitational force between two objects with masses m and M is
|F|
mMG
|r|2
where r is the distance between the objects, and G is the gravitational constant. Assume that the
object with mass M is located at the origin in R³. Then, the gravitational force field acting on
the object at the point r = (x, y, z) is given by
F(x, y, z) =
mMG
r3
r.
mMG
mMG
Show that the scalar vector field f(x, y, z) =
=
is a potential function for
r
√√x² + y² .
Fi.e. show that F = Vf.
Remark: f is the negative of the physical potential energy, because F = -V(-ƒ).
2. Suppose f(x) = 3x² - 5x. Show all your work for the problems below.
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