University Physics Volume 1
18th Edition
ISBN: 9781938168277
Author: William Moebs, Samuel J. Ling, Jeff Sanny
Publisher: OpenStax - Rice University
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Textbook Question
Chapter 6, Problem 120AP
A plumb bob bangs from the roof of a railroad car. The car rounds a circular track of radius 300.0 m at a speed of 90.0 km/b. At what angle relative to the vertical does the plumb bob hang?
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A skateboarder is attempting to make a circular arc of radius r = 11 m in a parking lot. The total mass of the skateboard and skateboarder is m = 86 kg. The coefficient of static friction between the surface of the parking lot and the wheels of the skateboard is μs = 0.59 .
He speeds up very slightly and begins to slide. The coefficient of kinetic friction is μk = 0.21. What is the new magnitude of his radial acceleration in m/s2?
A 0.50 kg mass attached to the end of a string swings in avertical circle (radius=2.0m). When the string is horizontal, the speed of the mass is 8.0m/s. What is the magnitude of the force of the string on the mass at this position?
A skateboarder is attempting to make a circular arc of radius r = 19 m in a parking lot. The total mass of the skateboard and skateboarder is m = 98 kg. The coefficient of static friction between the surface of the parking lot and the wheels of the skateboard is μs = 0.66.
The maximum speed he can go without slipping is 11.09 m/s.
He speeds up very slightly and begins to slide. The coefficient of kinetic friction is μk = 0.11. What is the new magnitude of his radial acceleration in m/s2?
Chapter 6 Solutions
University Physics Volume 1
Ch. 6 - Check Your Understanding Now calculate the scale...Ch. 6 - Check Your Understanding Calculate the...Ch. 6 - Check Your Understanding Determine a general...Ch. 6 - Check Your Understanding The soccer player stops...Ch. 6 - Check Your Understanding Find the direction of the...Ch. 6 - Check Your Understanding If atmospheric resistance...Ch. 6 - Check Your Understanding A block of mass 1.0 kg...Ch. 6 - Check Your Understanding The snowboarder is now...Ch. 6 - Check Your Understanding A car moving at 96.8 km/h...Ch. 6 - Check Your Understanding Find the terminal...
Ch. 6 - Check Your Understanding suppose the resistive...Ch. 6 - Solving Problems with Newton’s Laws To sirmulate...Ch. 6 - Friction The glue on a piece of tape can exert...Ch. 6 - When you learn to drive, you discover that you...Ch. 6 - When you push a pices of chalk across a...Ch. 6 - A physics major is cooking breakfast en she...Ch. 6 - Centripetal Force If you wish to reduce the stress...Ch. 6 - Define centripetal force. 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Anna says a...Ch. 6 - A nonrotating frame of reference placed at the...Ch. 6 - Athletes such as swimmers and bicyclists wear body...Ch. 6 - Two expressions were used for the drag force...Ch. 6 - As cars travel, oil and gasoline leaks onto the...Ch. 6 - Why can a squirrel jump from a tree branch to the...Ch. 6 - Solving Problems with Newton’s Laws A 30.0-kg girl...Ch. 6 - Find the tension in each of the three cables...Ch. 6 - Three forces act on an object, considered to be a...Ch. 6 - A flea jumps by exerting a force of...Ch. 6 - Two muscles in the back of the leg pull upward on...Ch. 6 - After a mishap, a 76.0-kg circus performer clings...Ch. 6 - A 35.0-kg dolphin decelerates from 12.0 to 7.50 m/...Ch. 6 - When starting a foot race, a 70.0-kg sprinter...Ch. 6 - A large rocket has a mass of 2.00106kgat takeoff,...Ch. 6 - A basketball player jumps straight up for a ball....Ch. 6 - A 2.50-kg fireworks shell is fired straight up...Ch. 6 - A 0.500-kg potato is fired at an angle of 80.0...Ch. 6 - An elevator filled with passengers has a mass of...Ch. 6 - A 20.O-g ball hangs from the roof of a freight car...Ch. 6 - A student’s backpack, full of textbooks, is hung...Ch. 6 - A service elevator takes a load of garbage, mass...Ch. 6 - A roller coaster car starts from rest at the top...Ch. 6 - The device shown below is the Atwood’s machine...Ch. 6 - Two blocks are connected by a massless rope as...Ch. 6 - Shown below are two carts connected by a cord that...Ch. 6 - A 2.00 kg block (mass 1) and a 4.00 kg block (mass...Ch. 6 - Friction (a) When rebuilding his car’s engine, a...Ch. 6 - (a) What is the maximum frictional force in the...Ch. 6 - Suppose you have a 120-kg wooden crate resting on...Ch. 6 - (a) If half of the weight of a small...Ch. 6 - A team of eight dogs pulls a sled with waxed wood...Ch. 6 - Consider the 65.0-kg ice skater being pushed by...Ch. 6 - Show that the acceleration of any object down a...Ch. 6 - Show that the acceleration of any object down an...Ch. 6 - Calculate the deceleration of a snow boarder going...Ch. 6 - A machine at a post office sends packages out a...Ch. 6 - If an object is to rest o an incline without...Ch. 6 - Calculate the maximum acceleration of a car that...Ch. 6 - Calculate the maximum acceleration of a car that...Ch. 6 - Repeat the preceding problem for a car with four-...Ch. 6 - A freight train consists of two 8.00105kgengines...Ch. 6 - Consider the 52.0-kg mountain climber shown below....Ch. 6 - A contestant in a winter sporting event pushes a...Ch. 6 - The contestant now pulls the block of ice with a...Ch. 6 - At a post office, a parcel that is a 20.0-kg box...Ch. 6 - (a) A 22.0-kg child is riding a playground...Ch. 6 - Calculate the centripetal force on the end of a...Ch. 6 - What Is the ideal banking angle for a gentle turn...Ch. 6 - What is the ideal speed to take a 100.0-m-radius...Ch. 6 - (a) What is the radius of a bobsled turn banked at...Ch. 6 - Part of riding a bicycle involves leaning at the...Ch. 6 - If a car takes a banked curve at less than the...Ch. 6 - Modem roller coasters have vertical loops like the...Ch. 6 - A child of mass 40.0 kg is in a roller coaster car...Ch. 6 - In the simple Bohr model of the ground state of...Ch. 6 - Railroad tracks follow a circular curve of radius...Ch. 6 - The CERN particle accelerator is circular with a...Ch. 6 - A car rounds an unbanked curve of radius 65 m. If...Ch. 6 - A banked highway is designed for traffic moving at...Ch. 6 - Drag Force and Terminal Speed The terminal...Ch. 6 - A 60.0-kg and a 90.0-kg skydiver jump from an...Ch. 6 - A 560-g squirrel with a surface area of...Ch. 6 - To maintain a constant speed, the force provided...Ch. 6 - By what factor does the drag force on a car...Ch. 6 - Calculate the velocity a spherical rain drop would...Ch. 6 - Using Stokes’ law, verify that the units for...Ch. 6 - Find the terminal velocity of a spherical...Ch. 6 - Stokes’ law describes sedimentation of particles...Ch. 6 - Suppose that the resistive force of the air on a...Ch. 6 - A small diamond of mass 10.0 g drops from a...Ch. 6 - (a) What is the final velocity of a car originally...Ch. 6 - A 75.0-kg man stands on a bathroom scale in an...Ch. 6 - (a) Calculate the minimum coefficient of friction...Ch. 6 - As shown below, if M=5.50kg , what is the tension...Ch. 6 - As shown below, if F=60.0Nand M=4.00kg, what is...Ch. 6 - As shown below, if M=6.0kg, what is the tension in...Ch. 6 - A small space probe Is released from a spaceship....Ch. 6 - A half-full recycling bin has mass 10 kg and is...Ch. 6 - A child has mass 6.0 kg and slides down a...Ch. 6 - The two barges shown here are coupled by a cable...Ch. 6 - If the order of the barges of the preceding...Ch. 6 - An object with mass m moves along the x -axis. Its...Ch. 6 - A helicopter with mass 2.35104kg has a position...Ch. 6 - Located at the origin, an electric car of mass mis...Ch. 6 - A particle of mass mis located at the origin. It...Ch. 6 - A 2.0-kg object has a velocity of at t=0 . 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