College Physics, Volume 1
2nd Edition
ISBN: 9781133710271
Author: Giordano
Publisher: Cengage
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Chapter 3, Problem 66P
To determine
The speed at which drag force is equal to car’s weight.
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During 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?
A 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.
A storage shed has a flat roof 4 meters long and 3 meters wide. A hurricane force wind blows across the roof at 35 m/sec. What is the approximate lift force on the roof? The density of air is 1.2 kg/m^2 (the air inside the shed isn't moving )
Chapter 3 Solutions
College Physics, Volume 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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A raft has dimensions of 6.1m by 3.7m and floats on water. A horse is loaded onto the raft and it sinks 3.8cm further into the water. A. Draw two FBDs for the raft, one when there is no horse and one when there is a horse. B. write out newtonns 2nd law C. Find the weight of the horsearrow_forwardCallie 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_forwardThe frictional force between two surfaces in contact does not depend on? a. whether the surface are stationary or not b. the normal force pressing them together c. whether a lubricant is used or not d. the area of the surfaces in contactarrow_forward
- The drag force exerted on a car by air depends on a dimensionless drag coefficient, the density of air, the car velocity, and the frontal area of the car. That is, FD = function (CDrag, Afront, r, V). Based on unit considerations alone, obtain a relation for the drag force.arrow_forwardLike friction, drag force opposes the motion of a particle in a fluid; however, drag force depends on the particle's velocity. Find the expression for the particle's velocity v(x) as a function of position at any point x in a fluid whose drag force is expressed as Fdrag = kmv where k is a constant, m is the mass of the particle and v is its velocity. Assume that the particle is constrained to move in the x-axis only with an initial velocity v0. Solution: The net force along the x-axis is: ΣF = -F = m then: -mv = m Since acceleration is the first time derivative of velocity a = dv/dt, -mv = m We can eliminate time dt by expressing, the velocity on the left side of the equation as v = dx/dt. Manipulating the variables and simplifying, we arrive at the following expression / = -k "Isolating" the infinitesimal velocity dx and integrating with respect to dx, we arrive at the following: = v0 - which shows that velocity decreases in a linear manner.arrow_forwardA man exerts a northward force of 100 newtons on a 50 kilogram box which sits on a level floor. If the frictional force is 80 newtons, what is the magnitude of the northward acceleration of the box?arrow_forward
- Assume that you weigh 500 N. If you are falling down through the air at constant speed, the force of the air against your body is a) zero b) more than 0 but less than 500 N c) 500 N d) more than 500 N e) need more information Explain with thorough reasoning.arrow_forwardA storage shed has a flat roof 4 meters long and 3 meters wide. A hurricane force wind blows across the roof at 35 m/sec. What is the approximate lift force on the roof? (Density of air = 1.2 kg/m^2 and the air inside the shed is not moving)arrow_forwardPick out the scalar quantity: A. force B. pressure C. velocity D. accelerationarrow_forward
- A 7-m-diameter hot air balloon that has a total mass of 350 kg is standing still in air on a windless day. The balloon is suddenly subjected to 40 km/h winds. Determine the initial acceleration of the balloon in the horizontal direction.arrow_forwardTwo racquetballs, each having a mass of 170 g, are placed in a glass jar asshown. Their centers lie on a straight line that makes a 45° angle with the horizontal. (a) Assume the walls are frictionless and determine P1, P2, and P3. (b) Determine the magnitude of the force exerted by the left ball on the right ball.arrow_forwardThe vehicle weights about 5x10^3lb and is used to lift a rock weighing 1x1063lb. The container of the weights about 2x10^2lb. the acceleration of the vehicle is 1ft/s^2. Determine A)horizontal force between the tires and the ground (lb) , b) force between the rock and the cointainer of the rock (lb)arrow_forward
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