The drag force is an important fact of life for the small marine crustaceans called copepods. The drag force for small objects in water is very different from the drag force in air, so the drag equations of this chapter don’t apply. However, we can estimate the drag force from data. The velocity graph of Figure P5.62 shows two phases of the swimming motion of a 1.8 mg copepod. First it swims vigorously, speeding up; then it stows down under the influence of drag. What is the magnitude of the drag force? What is the ratio of the drag force to the copepod’s weight? Figure P5.62
The drag force is an important fact of life for the small marine crustaceans called copepods. The drag force for small objects in water is very different from the drag force in air, so the drag equations of this chapter don’t apply. However, we can estimate the drag force from data. The velocity graph of Figure P5.62 shows two phases of the swimming motion of a 1.8 mg copepod. First it swims vigorously, speeding up; then it stows down under the influence of drag. What is the magnitude of the drag force? What is the ratio of the drag force to the copepod’s weight? Figure P5.62
The drag force is an important fact of life for the small marine crustaceans called copepods. The drag force for small objects in water is very different from the drag force in air, so the drag equations of this chapter don’t apply. However, we can estimate the drag force from data. The velocity graph of Figure P5.62 shows two phases of the swimming motion of a 1.8 mg copepod. First it swims vigorously, speeding up; then it stows down under the influence of drag. What is the magnitude of the drag force? What is the ratio of the drag force to the copepod’s weight?
Biologists have estimated the drag coefficient of a swimming penguin by observing the rate at which a penguin’s speed decreases in its glide phase, when it’s not actively swimming and is slowing down. In one study, a gliding 4.8 kg Gentoo penguin has an acceleration of -0.52 m/s2 when its speed is 1.60 m/s. If its frontal area is 0.020 m2, what is the penguin’s drag coefficient?
A car is traveling at 60.0 km/h on a flat highway.
(a) If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop? m(b) What is the stopping distance when the surface is dry and the coefficient of friction is 0.600? m
A 560 g squirrel with a surface area of 930 cm2 falls from a 5.0 m tree to the ground. Calculate the terminal velocity using the drag coefficient for a horizontal skydiver.
Group of answer choices
9.7 m/s
9.8 m/s
9.9 m/s
10 m/s
Chapter 5 Solutions
College Physics: A Strategic Approach Technology Update, Books a la Carte Plus Mastering Physics with Pearson eText -- Access Card Package (3rd Edition)
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
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