COLLEGE PHYSICS,VOL.1
2nd Edition
ISBN: 9781111570958
Author: Giordano
Publisher: CENGAGE L
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Chapter 3, Problem 74P
To determine
Force of air drag.
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A paratrooper and his 8-m-diameter parachute weigh 950 N. Taking the average air density to be 1.2 kg/m3, determine the terminal velocity of the paratrooper.
A racquetball has a radius of 0.0295 m. The drag coefficient of the ball is 0.35, and the density of the air is 1.29 kg/m3. What would be the terminal speed for the racquetball if it were dropped from a very high cliff, assuming it has a mass of 0.0394 kg?
What is most nearly the terminal velocity of a 50mm diameter solid aluminum sphere falling in air? the sphere has a coefficient of drag of 0.5, density of aluminum is 2650 kg/m^3 , and density of air is 1.225 kg/m^3.Answer: 53 m/s
Chapter 3 Solutions
COLLEGE PHYSICS,VOL.1
Ch. 3.2 - Prob. 3.1CCCh. 3.3 - Prob. 3.2CCCh. 3.4 - Prob. 3.3CCCh. 3.4 - Prob. 3.4CCCh. 3.5 - Prob. 3.5CCCh. 3.6 - Prob. 3.6CCCh. 3.7 - Acceleration of a Skydiver Figure 3.27 shows a...Ch. 3 - Prob. 1QCh. 3 - Prob. 2QCh. 3 - Prob. 3Q
Ch. 3 - Prob. 4QCh. 3 - Prob. 5QCh. 3 - Prob. 6QCh. 3 - Prob. 7QCh. 3 - Prob. 8QCh. 3 - The lower piece of silk in Figure 3.20 is acted on...Ch. 3 - Devise a block-and-tackle arrangement that...Ch. 3 - Prob. 11QCh. 3 - Prob. 12QCh. 3 - Prob. 13QCh. 3 - Prob. 14QCh. 3 - Prob. 15QCh. 3 - Prob. 16QCh. 3 - Prob. 17QCh. 3 - Prob. 18QCh. 3 - Prob. 19QCh. 3 - Prob. 1PCh. 3 - Prob. 2PCh. 3 - Prob. 3PCh. 3 - Prob. 4PCh. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7PCh. 3 - Prob. 8PCh. 3 - Prob. 9PCh. 3 - Prob. 10PCh. 3 - Prob. 11PCh. 3 - Prob. 12PCh. 3 - Prob. 13PCh. 3 - Prob. 14PCh. 3 - Prob. 15PCh. 3 - Prob. 16PCh. 3 - Prob. 17PCh. 3 - Prob. 18PCh. 3 - Prob. 19PCh. 3 - Prob. 20PCh. 3 - Prob. 21PCh. 3 - Prob. 22PCh. 3 - A bullet is fired upward with a speed v0 from the...Ch. 3 - Prob. 24PCh. 3 - Prob. 25PCh. 3 - Prob. 26PCh. 3 - Prob. 27PCh. 3 - Prob. 28PCh. 3 - Prob. 29PCh. 3 - Prob. 30PCh. 3 - Prob. 31PCh. 3 - Prob. 32PCh. 3 - Your friends car has broken down, and you...Ch. 3 - Prob. 34PCh. 3 - Prob. 35PCh. 3 - Prob. 36PCh. 3 - Prob. 37PCh. 3 - Prob. 38PCh. 3 - Prob. 39PCh. 3 - You are given the job of moving a refrigerator of...Ch. 3 - Prob. 41PCh. 3 - Prob. 42PCh. 3 - Prob. 43PCh. 3 - Prob. 44PCh. 3 - Prob. 45PCh. 3 - Prob. 46PCh. 3 - A hockey puck slides along a rough, icy surface....Ch. 3 - Prob. 48PCh. 3 - Prob. 49PCh. 3 - Prob. 50PCh. 3 - Prob. 51PCh. 3 - Prob. 52PCh. 3 - Prob. 53PCh. 3 - Prob. 54PCh. 3 - Prob. 55PCh. 3 - Prob. 56PCh. 3 - Prob. 57PCh. 3 - Prob. 58PCh. 3 - Prob. 59PCh. 3 - Prob. 60PCh. 3 - A crate of mass 55 kg is attached to one end of a...Ch. 3 - Prob. 62PCh. 3 - Prob. 63PCh. 3 - In traction. When a large bone such as the femur...Ch. 3 - Prob. 65PCh. 3 - Prob. 66PCh. 3 - Prob. 67PCh. 3 - Prob. 68PCh. 3 - Calculate the terminal speed for a pollen grain...Ch. 3 - Prob. 70PCh. 3 - Prob. 71PCh. 3 - Calculate the terminal speed for a baseball. A...Ch. 3 - Prob. 73PCh. 3 - Prob. 74PCh. 3 - Prob. 75PCh. 3 - Prob. 76PCh. 3 - Prob. 77PCh. 3 - Prob. 78PCh. 3 - Prob. 79PCh. 3 - Prob. 80PCh. 3 - Prob. 81PCh. 3 - Prob. 82PCh. 3 - Prob. 83PCh. 3 - Prob. 84PCh. 3 - Prob. 85PCh. 3 - An impish young lad Stands on a bridge 10 m above...Ch. 3 - Prob. 87PCh. 3 - Prob. 88PCh. 3 - Prob. 89PCh. 3 - Prob. 90PCh. 3 - Prob. 91PCh. 3 - Prob. 92PCh. 3 - Prob. 93PCh. 3 - Prob. 94PCh. 3 - Prob. 95PCh. 3 - Prob. 96PCh. 3 - Prob. 97PCh. 3 - Prob. 98PCh. 3 - Prob. 99P
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- Callie is running a 400 m race around a 400 m track. On the backstretch her velocity is 8 m/s, but she is running into a 2 m/s headwind. How large is the drag force that acts on Callie? Assume that the density of the air is 1.2 kg/m3, that Callie’s cross-sectional area is 0.5 m2, and that her coefficient of drag is 1.1.arrow_forwardFrozen rain with spherical shape falls from 3.00 km, what is its velocity if the diameter is 0.3 mm? with air drag (density of air=1.225 x kg/ m3arrow_forwardA tennis ball is thrown at 25 m/s on a day when the wind speed is 0 m/s. What is the drag force acting on the tennis ball if the coefficient of drag is 0.4 and the reference area is 0.005 m2? The density of air is 1.2 kg/m3.arrow_forward
- Dandelion seeds have a plume made of thin filaments that create a very large drag coefficient due to subtle aerodynamics as the air moves through and past the plume. The slower terminal speed and longer time in the air provide greater dispersal than would be possible for simple spherical seeds. A 0.63 mg seed has a plume with a cross-section area of 13 mm, and it falls with a terminal speed of 40 cm/s.arrow_forward8. A 24.0-cm-diameter cylinder with length of 60.0 cm which it is falling vertically on its circular side has a terminal speed of 90 m/s in the air. What is the cylinder's mass? Density of air is 1.3 kg/m³ and drag coefficient of C=0.75.arrow_forwardA spherical object with a mass of 75 Kg object and radius of 0.5 m is dropped from a plane flying in the sky. Determine the drag coefficient C if the object attains a terminal velocity of 100m/s. Assume the density of air is 1.207kg/m^3arrow_forward
- At its widest point, the diameter of a bottlenose dolphin is 0.50 m. Bottlenose dolphins are particularly sleek, having a drag coefficient of only about 0.090. Take the water density to be 1,000 kg/m3. What is the drag force acting on such a dolphin swimming at 4.8 m/s?arrow_forwardA 60 kg skydiver can be modeled as a rectangular "box" with dimensions 22 cm × 40 cm × 1.8 m. What is his terminal speed if he falls feet first? Suppose that the density of air is 1.2 kg/m3.arrow_forwardthe total aerodynamic force F acting on the airplane has a magnitude of 6250 lb. Resolve this force into vertical and horizontal componentsarrow_forward
- The seed pods of maple trees, also known as "helicopter seeds," spin as they fall, generating a leading edge vortex at the outer edge of each wing-like seed pod. This effect, similar to the vortices generated by hummingbird wings, can generate a sufficient lift force to keep the seed floating in air, allowing it to be dispersed by the wind. The figure below shows a pair of maple seeds L = 3.40 cm in length, with an angle of 70.0⁰ separating the seeds, as shown. If the outer edge of the seeds must rotate with a speed of 1.25 m/s for sufficient lift to be generated, what is the centripetal acceleration of the outer edge of the seeds (in m/s²) as they fall? (Enter the magnitude. Assume the seeds are symmetric about the vertical axis as they fall, as in the figure.) =arrow_forwardA cup cake liner with a mass of 0.397 g, cross section area A = 42.3 cm² and a drag coefficient of D = 0.644 is dropped from rest. Find the magnitude of its terminal velocity in m/s. Use g=9.806 m/s² and an air density of 1.20 kg/m³. Enter the number only, without the unit.arrow_forwardDuring the 400 m race in question 5, Callie is now in the homestretch. Assume that the density of the air is 1.2 kg/m, that Callie’s cross-sectional area is 0.5 m2, and that her coefficient of drag is 1.1. Her velocity is still 8 m/s, but she now has a 2 m/s tailwind. How large is the drag force acting on Callie now?arrow_forward
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