EBK ESSENTIAL UNIVERSITY PHYSICS, VOLUM
4th Edition
ISBN: 9780135272947
Author: Wolfson
Publisher: VST
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Chapter 1, Problem 32E
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You are attending a county fair with your friend from your physics class. While walking around the fairgrounds, you discover a new game of skill. A thin rod of mass M = 0.550 kg and length l = 2.80 m hangs from a friction-free pivot at its upper end as shown in the figure.
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The front surface of the rod is covered with Velcro. You are to throw a Velcro-covered ball of mass m = 1.20 kg at the rod in an attempt to make it swing backward and rotate all the way across the top. The ball must stick to the rod at all times after striking it. If you cause the rod to rotate over the top
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A hanging weight, with a mass of m₁ = 0.365 kg, is attached by a rope to a block with mass m₂ = 0.835 kg as shown in the figure below. The rope goes over a pulley with a mass of M = 0.350 kg. The pulley can be modeled as a hollow cylinder with an inner radius of R₁ = 0.0200 m, and an outer radius of
R2 = 0.0300 m; the mass of the spokes is negligible. As the weight falls, the block slides on the table, and the coefficient of kinetic friction between the block and the table is μ = 0.250. At the instant shown, the block is moving with a velocity of v; = 0.820 m/s toward the pulley. Assume that the pulley is
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R₂
R₁
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mi
(a) Using energy methods, find the speed of the block (in m/s) after it has moved a distance of 0.700 m away from the initial position shown.
(No Response) m/s
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Chapter 1 Solutions
EBK ESSENTIAL UNIVERSITY PHYSICS, VOLUM
Ch. 1.2 - A Canadian speed limit of 50 km/h is closest to...Ch. 1.3 - Rank the numbers according to (1) their size and...Ch. 1 - Explain why measurement standards based on...Ch. 1 - Prob. 2FTDCh. 1 - Why doesnt Earths rotation provide a suitable time...Ch. 1 - To raise a power of 10 to another power, you...Ch. 1 - What facts might a scientist use in estimating...Ch. 1 - How would you determine the length of a curved...Ch. 1 - Write 1/x as x to some power.Ch. 1 - Emissions of carbon dioxide from fossil-fuel...
Ch. 1 - What is meant by an explicit-constant definition...Ch. 1 - Youre asked to make a rough estimate of the total...Ch. 1 - The power output of a typical large power plant is...Ch. 1 - The diameter of a hydrogen atom is about 0.1 nm,...Ch. 1 - Use the definition of the meter to determine how...Ch. 1 - Lake Baikal in Siberia holds the worlds largest...Ch. 1 - A hydrogen atom is about 0.1 nm in diameter. How...Ch. 1 - How long a piece of wire would you need to form a...Ch. 1 - Making a turn, a jetliner flies 2.1 km on a...Ch. 1 - A car is moving at 35.0 mi/h. Express its speed in...Ch. 1 - You have postage for a 1-oz letter but only a...Ch. 1 - A year is very nearly 107s. By what percentage...Ch. 1 - How many cubic centimeters are in a cubic meter?Ch. 1 - Prob. 22ECh. 1 - A gallon of paint covers 350 ft2. Whats its...Ch. 1 - Highways in Canada have speed limits of 100 km/h....Ch. 1 - One m/s is how many km/h?Ch. 1 - A 3.0-lb box of grass seed will seed 2100 ft2 of...Ch. 1 - A radian is how many degrees?Ch. 1 - Convert the following to SI units: (a) 55 mi/h:...Ch. 1 - The distance to the Andromeda galaxy, the nearest...Ch. 1 -
Add 3.6×105 m and 2.1 × 103 km.
Ch. 1 -
Divide 4.2 × 103 m/s by 0.57 ms, and express your...Ch. 1 - Prob. 32ECh. 1 - Find the cube root of 6.4 1019 without a...Ch. 1 - Add 1.46 m and 2.3 cm.Ch. 1 - Youre asked to specify the length of an updated...Ch. 1 - Repeat the preceding exercise, this time using...Ch. 1 -
Express a 45 mi/h speed limit in meters per...Ch. 1 - Prob. 38ECh. 1 - Prob. 39ECh. 1 - Prob. 40ECh. 1 - Prob. 41ECh. 1 - Prob. 42ECh. 1 - Prob. 43ECh. 1 - Prob. 44ECh. 1 - To see why its important to carry more digits in...Ch. 1 - Youve been hired as an environmental watchdog for...Ch. 1 - The average dairy cow produces about 104 kg of...Ch. 1 - How many Earths would fit inside the Sun?Ch. 1 - The average American uses electrical energy at the...Ch. 1 -
Estimate, to an order of magnitude, the number of...Ch. 1 - A human hair is about 100 m across. Estimate the...Ch. 1 - Youre working in the fraud protection division of...Ch. 1 - Bubble gums density is about 1 g/cm3. You blow an...Ch. 1 - The Moon barely covers the Sun during a solar...Ch. 1 - The semiconductor chip at the heart of a personal...Ch. 1 - Estimate the number of (a) atoms and (b) cells in...Ch. 1 -
The numbers 1.27 and 9.97 are both good to three...Ch. 1 - Continental drift occurs at about the rate your...Ch. 1 - Youre driving into Canada and trying to decide...Ch. 1 - In the 1908 London Olympics, the intended 26-mile...Ch. 1 - An environmental group is lobbying to shut down a...Ch. 1 - If youre working from the print version of this...Ch. 1 - Estimate the area of skin on your body.Ch. 1 - Estimate the mass of water in the worlds oceans,...Ch. 1 - Express the following with appropriate units and...Ch. 1 - Prob. 66PCh. 1 - Prob. 67PCh. 1 - The world consumes energy at the rate of about 500...Ch. 1 - The volume of a sphere is given by V=43r3, where r...Ch. 1 - The human body contains about 1014 cells, and the...Ch. 1 - The human body contains about 1014 cells, and the...Ch. 1 - The human body contains about 1014 cells, and the...Ch. 1 - The human body contains about 1014 cells, and the...
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- A stiff, thin, metal rod with negligible mass is free to rotate in a vertical plane about pivot point P, as shown in the figure below. The rod has three small beads (labeled 1, 2, and 3 in the figure), all with the same mass m, attached to it as shown. The rod is held horizontally and then released from rest at time t = 0. Find all results below in terms of the mass m, distance d, and acceleration due to gravity g. 1 P m m 2 2d 23 m 3 (a) What is the moment of inertia of the system of three particles about the pivot point P? I= (No Response) (b) What is the net torque magnitude about point P at t = 0? Tnet = (No Response) (c) What is the angular acceleration of the system about point P at t = 0? magnitude direction α = (No Response) (No Response) (d) What is the linear acceleration of bead 3 at t = 0? magnitude a = (No Response) direction (No Response) (e) What is the maximum kinetic energy of the system? K = (No Response) max (f) What is the maximum angular speed about point P…arrow_forwardDuring a concentric loading of the quadriceps muscle in the upper leg, an athlete extends his lower leg from a vertical position (see figure (a)) to a fully extended horizontal position (see figure (b)) at a constant angular speed of 45.0° per second. Two of the four quadriceps muscles, the vastis intermedius and the rectus femoris, terminate at the patellar tendon which is attached to the top of the tibia in the lower leg. The distance from the point of attachment of the patellar tendon to the rotation axis of the tibia relative to the femur is 4.10 cm in this athlete. a b (a) The two quadriceps muscles can exert a maximum force of 225 N through the patellar tendon. This force is applied at an angle of 25.0° to the section of the tibia between the attachment point and the rotation axis. What is the torque (in N m) exerted by the muscle on the lower leg during this motion? (Enter the magnitude.) (No Response) N⚫ m (b) What is the power (in W) generated by the athlete during the motion?…arrow_forwardA 3.1-kg sphere is suspended by a cord that passes over a 1.6-kg pulley of radius 3.3 cm. The cord is attached to a spring whose force constant is k = 86 N/m as in the figure below. Assume the pulley is a solid disk. www m (a) If the sphere is released from rest with the spring unstretched, what distance does the sphere fall through before stopping? (No Response) m (b) Find the speed of the sphere after it has fallen 25 cm. (No Response) m/sarrow_forward
- The angular momentum vector of a precessing gyroscope sweeps out a cone as shown in the figure below. The angular speed of the tip of the angular momentum vector, called its precessional frequency, is given by @p = t/L, where is the magnitude of the torque on the gyroscope and L is the magnitude of its angular momentum. In the motion called precession of the equinoxes, the Earth's axis of rotation precesses about the perpendicular to its orbital plane with a period of 2.58 × 104 yr. Model the Earth as a uniform sphere and calculate the torque on the Earth that is causing this precession. (No Response) N⚫ marrow_forwardA space station shaped like a giant wheel has a radius of 121 m and a moment of inertia of 5.12 × 108 kg. m². A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1g. When 100 people move to the center of the station for a union meeting, the angular speed changes. What apparent acceleration is experienced by the managers remaining at the rim? Assume that the average mass of each inhabitant is 65.0 kg. (No Response) m/s²arrow_forward(a) An asteroid is in an elliptical orbit around a distant star. At its closest approach, the asteroid is 0.640 AU from the star and has a speed of 54.0 km/s. When the asteroid is at its farthest distance from the star of 39.0 AU, what is its speed (in km/s)? (1 AU is the average distance from the Earth to the Sun and is equal to 1.496 × 1011 m. You may assume that other planets and smaller objects in the star system exert negligible forces on the asteroid.) (No Response) km/s (b) What If? A comet is in a highly elliptical orbit around the same star. The comet's greatest distance from the star is 23,300 times larger than its closest distance to the star. The comet's speed at its greatest distance is 2.10 x 10-2 km/s. What is the speed (in km/s) of the comet at its closest approach? (No Response) km/sarrow_forward
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