The force exerted by the wind on a sailboat is approximately perpendicular 10 the sail and proportional to the component of the wind velocity perpendicular to the sail. For the 800-kg sailboat shown in Figure P4.58. the force exerted by the wind on the sailboat is F soil = ( 550 N m/s ) v wind Water exerts a force along the keel (bottom) of the boat that prevents it from moving sideways, as shown in the figure Once the boat starts moving forward, water also exerts a drag force backwards on the boat, opposing the forward motion. If a 17-knot wind (1 knot = 0.514 m/s) is blowing to the east, what is the initial acceleration of the sailboat? Figure P 4.58
The force exerted by the wind on a sailboat is approximately perpendicular 10 the sail and proportional to the component of the wind velocity perpendicular to the sail. For the 800-kg sailboat shown in Figure P4.58. the force exerted by the wind on the sailboat is F soil = ( 550 N m/s ) v wind Water exerts a force along the keel (bottom) of the boat that prevents it from moving sideways, as shown in the figure Once the boat starts moving forward, water also exerts a drag force backwards on the boat, opposing the forward motion. If a 17-knot wind (1 knot = 0.514 m/s) is blowing to the east, what is the initial acceleration of the sailboat? Figure P 4.58
Solution Summary: The author calculates the force exerted by the wind component on the sailboat.
The force exerted by the wind on a sailboat is approximately perpendicular 10 the sail and proportional to the component of the wind velocity perpendicular to the sail. For the 800-kg sailboat shown in Figure P4.58. the force exerted by the wind on the sailboat is
F
soil
=
(
550
N
m/s
)
v
wind
Water exerts a force along the keel (bottom) of the boat that prevents it from moving sideways, as shown in the figure Once the boat starts moving forward, water also exerts a drag force backwards on the boat, opposing the forward motion. If a 17-knot wind (1 knot = 0.514 m/s) is blowing to the east, what is the initial acceleration of the sailboat?
A 137 kg boat is trying to go, from the
origin (as shown in the figure), straight
across the river at a speed 0.7198 m/s in
the y-direction. The current in the river,
however, flows to the right and apply a net
force of 100 N (x-direction).
a) What is the position vector of the boat
after 2 seconds.
b) What is the velocity of the boat after 3
seconds.
Vboat,y
Initial position of the boat is:
Ij =
+
A hot air balloon begins to rise from rest. The lift on the balloon due to the buoyant force is 5000 N.
In order to minimize the time until the passenger is reunited with their cell phone, what should the horizontal component of the passenger’s velocity be so that they land directly on their phone which is initially 3 m away in the horizontal direction?
Lauren pulls her 18 kg suitcase at a constant speed by pulling on a handle that makes an angle of θ with the horizontal. The frictional force on the suitcase is 27 N and Lauren exerts a 43 N orce on the handle.
a) What angle does the handle make with the horizontal?
b) What is the normal force exerted on the suitcase?
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