Applied Physics
11th Edition
ISBN: 9780132719865
Author: EWEN, Dale
Publisher: PEARSON
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Textbook Question
Chapter 9.1, Problem 24P
An airplane circles an airport twice while 5.00 mi from the control tower. Find the length of the arc through which the plane travels.
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A bungee jumper plans to bungee jump from a bridge 64.0 m above the ground. He plans to use a uniform elastic cord, tied to a harness around his body, to stop his fall at a point 6.00 m above the water. Model his body as a particle and the cord as having negligible mass and obeying
Hooke's law. In a preliminary test he finds that when hanging at rest from a 5.00 m length of the cord, his body weight stretches it by 1.55 m. He will drop from rest at the point where the top end of a longer section of the cord is attached to the bridge.
(a) What length of cord should he use?
Use subscripts 1 and 2 respectively to represent the 5.00 m test length and the actual jump length. Use Hooke's law F = KAL and the fact that the change in length AL for a given force is proportional the length L (AL = CL), to determine the force constant for the test case and for the
jump case. Use conservation of mechanical energy to determine the length of the rope. m
(b) What maximum acceleration will he…
Chapter 9 Solutions
Applied Physics
Ch. 9.1 - Convert 612 revolutions a. to radians. b. to...Ch. 9.1 - Convert 2880 a. to revolutions. b. to radians.Ch. 9.1 - Convert 25 rad a. to revolutions. b. to degrees.Ch. 9.1 - Convert 12.0 revolutions a. to radians. b. to...Ch. 9.1 - Number of revolutions = 525 t = 3.42 min = ______...Ch. 9.1 - Number of revolutions = 7360 t = 37.0 s = _______...Ch. 9.1 - Number of revolutions = 4.00 t = 3.00 s =...Ch. 9.1 - Number of re volutions = 325 t = 5.00 min =...Ch. 9.1 - Number of revolutions = 6370 t = 18.0s = ________...Ch. 9.1 - Number of revolutions = 6.25 t = 5.05 s =...
Ch. 9.1 - Convert 675 rad/s to rpm.Ch. 9.1 - Convert 285 rpm to rad/s.Ch. 9.1 - Convert 136 rpm to rad/s.Ch. 9.1 - Convert 88.4 rad/s to rpm.Ch. 9.1 - A motor turns at a rate of 11.0 rev/s. Find its...Ch. 9.1 - A rotor turns at a rate 180 rpm. Find its angular...Ch. 9.1 - A rotating wheel completes one revolution in 0.150...Ch. 9.1 - A rotor completes 50.0 revolutions in 3.25 s. Find...Ch. 9.1 - A flywheel rotates at 1050 rpm. (a) How long (in...Ch. 9.1 - A wheel rotates at 36.0 rad/s. (a) How long (in s)...Ch. 9.1 - A shaft of radius 8.50 cm rotates 7.00 rad/s. Find...Ch. 9.1 - Awheel of radius 0.240 m turns at 4.00 rev/s. Find...Ch. 9.1 - A pendulum of length 1.50 m swings through an arc...Ch. 9.1 - An airplane circles an airport twice while 5.00 mi...Ch. 9.1 - A wheel of radius 27.0 cm has an angular speed of...Ch. 9.1 - A belt is placed around a pulley that is 30.0 cm...Ch. 9.1 - A flywheel of radius 25.0 cm is rotating at 655...Ch. 9.1 - An airplane propeller with blades 2.00 m long is...Ch. 9.1 - An automobile is traveling at 60.0 km/h. Its tires...Ch. 9.1 - Ftnd the angular speed (in rad/s) of the following...Ch. 9.1 - A bicycle wheel of diameter 30 0 in rotates twice...Ch. 9.1 - A point on the rim of a flywheel with radius 1.50...Ch. 9.1 - The earth rotates on its axis at an angular speed...Ch. 9.1 - A truck tire rotates at an initial angular speed...Ch. 9.1 - Find the angular acceleration of a radiator fan...Ch. 9.1 - A wheel of radius 20.0 cm starts from rest and...Ch. 9.1 - A circular disk 30.0 cm in diameter is rotating at...Ch. 9.1 - A rotating flywheel of diameter 40.0 cm uniformly...Ch. 9.3 - Given: m = 64.0 kg = 34.0 m/s r = 17.0 m F =...Ch. 9.3 - Given: m = 11.3 slugs = 3.00 ft/s r = 3.24 ft F =...Ch. 9.3 - Given: F = 2500 lb = 47.6 ft/s r = 72.0 ft m =...Ch. 9.3 - Given: F = 587 N = 0.780 m/s m = 67.0 kg r =...Ch. 9.3 - Given: F = 602 N m = 63.0 kg r = 3.20 m =...Ch. 9.3 - Given: m = 37.5 kg = 17.0 m/s r = 3.75 m F =...Ch. 9.3 - Given: F = 75.0 N = 1.20 m/s m = 100 kg r =...Ch. 9.3 - Given: F = 80.0 N m = 43.0 kg r = 17.5 m =...Ch. 9.3 - An automobile of mass 117 slugs follows a curve of...Ch. 9.3 - Find the centripetal force exerted on a 7.12-kg...Ch. 9.3 - The centripetal force on a car of mass 800kg...Ch. 9.3 - The centripetal force on a runner is 17.0 lb. If...Ch. 9.3 - An automobile with mass 1650 kg is driven around a...Ch. 9.3 - A cycle of mass 510 kg rounds a curve of radius 40...Ch. 9.3 - What is the centripetal force exerted on a rock...Ch. 9.3 - What is the centripetal force on a 1500-kg vehicle...Ch. 9.3 - What is the centripetal force on a 750-kg vehicle...Ch. 9.3 - A truck with mass 215 slugs rounds a curve of...Ch. 9.3 - A 225-kg dirt bike is rounding a curve with linear...Ch. 9.3 - A 55,000-kg truck rounds a curve at 62.0 km/h. If...Ch. 9.3 - The radius of a curve is 27.5 m. What is the...Ch. 9.4 - Given: = 125 lb ft = 555 rpm P = ________ ft...Ch. 9.4 - Given: = 39.4 N m = 6.70/s P = _________ WCh. 9.4 - Given: = 372 lb ft = 264 rpm P = __________ hpCh. 9.4 - Given: = 650 N m = 45.0/s P = _________ kWCh. 9.4 - Giver: P = 8950W = 4.80/s = _____________Ch. 9.4 - Given: P = 650W = 540 N m = ________Ch. 9.4 - What horsepower is developed by an engine with...Ch. 9.4 - What torque must be applied to develop 175 ft fb/s...Ch. 9.4 - Find the angular velocity of a motor developing...Ch. 9.4 - A high-speed industrial drill develops 0.500 hp at...Ch. 9.4 - An engine has torque of 550 N m at 8.3 rad/s. What...Ch. 9.4 - Find the angular velocity of a motor developing...Ch. 9.4 - What power (in hp) is developed by an engine with...Ch. 9.4 - Find the angular velocity of a motor developing...Ch. 9.4 - A drill develops 0.500 kW of power at 1800 rpm....Ch. 9.4 - What power is developed by an engine with torque...Ch. 9.4 - A tangential force of 150 N is applied to a...Ch. 9.4 - Find the power developed by an engine with a...Ch. 9.4 - Find the power developed by an engine with a...Ch. 9.4 - Find the power developed by an engine with torque...Ch. 9.4 - Find the angular velocity of a motor daveloping...Ch. 9.4 - A motor develops 0.75 kW of power at 2000...Ch. 9.4 - What power is developed when a tangential force of...Ch. 9.4 - What power is developed when a tangential force of...Ch. 9.4 - An engine develops 1.50 kW of power at 10,000...Ch. 9.4 - A mechanic tightens engine bolts using 45.5 N m of...Ch. 9.4 - An ag mechanic tightens implement bolts using 52.5...Ch. 9.6 - Prob. 1PCh. 9.6 - Prob. 2PCh. 9.6 - Prob. 3PCh. 9.6 - Prob. 4PCh. 9.6 - Prob. 5PCh. 9.6 - Prob. 6PCh. 9.6 - A driver gear has 36 teeth and makes 85.0 rpm....Ch. 9.6 - A motor turning at 1250 rpm is fitted with a gear...Ch. 9.6 - A gear running at 250 rpm meshes with another...Ch. 9.6 - A driver gear with 40 teeth makes 154 rpm. How...Ch. 9.6 - Two gears have a speed ratio of 4.2 to 1. If the...Ch. 9.6 - What size gear should be meshed with a 15-tooth...Ch. 9.6 - A driver gear has 72 teeth and makes 162 rpm. Find...Ch. 9.6 - A driver gear with 60 teeth makes 1600 rpm. How...Ch. 9.6 - What size gear should be meshed with a 20-tooth...Ch. 9.6 - A motor turning at 1500 rpm is fitted with a gear...Ch. 9.6 - The larger of two gears in a clock has 36 teeth...Ch. 9.6 - How many revolutions does an 88-tooth gear make in...Ch. 9.6 - If gear A turns in a clockwise motion, determine...Ch. 9.6 - If gear A turns in a clockwise motion, determine...Ch. 9.6 - If gear A turns in a clockwise motion, determine...Ch. 9.6 - If gear A turns in a clockwise motion, determine...Ch. 9.6 - If gear A turns in a clockwise motion, determine...Ch. 9.6 - If gear A turns in a clockwise motion, determine...Ch. 9.6 - If gear A turns in a clockwise motion, determine...Ch. 9.6 - If gear A turns in a clockwise motion, determine...Ch. 9.6 - If gear A turns in a clockwise motion, determine...Ch. 9.6 - If gear A turns in a clockwise motion, determine...Ch. 9.6 - Find the speed in rpm of gear D in each gear...Ch. 9.6 - Find the speed in rpm of gear D in each gear...Ch. 9.6 - Find the speed in rpm of gear D in each gear...Ch. 9.6 - Find the speed in rpm of gear D in each gear...Ch. 9.6 - Find the speed in rpm of gear D in each gear...Ch. 9.6 - Find the number of teeth for gear D in each rear...Ch. 9.6 - Find the number of teeth for gear D in each gear...Ch. 9.6 - Find the number of teeth for gear D in each gear...Ch. 9.6 - Find the number of teeth for gear D in each gear...Ch. 9.6 - Find the number of teeth for gear D in each gear...Ch. 9.6 - Find the direction of rotation of gear B if gear A...Ch. 9.6 - Find the effect of doubling the number of teeth on...Ch. 9.7 - Find each missing quantity using DN = dn. 1.Ch. 9.7 - Find each missing quantity using DN = dn. 2.Ch. 9.7 - Find Bach missing quantity using DN = dn. 3.Ch. 9.7 - Find each missing quantity using DN = dn. 4.Ch. 9.7 - Find each missing quantity using DN = dn. 5.Ch. 9.7 - A driver pulley of diameter 6.50 in. revolves at...Ch. 9.7 - A driver pulley of diameter 25.0 cm revolves at...Ch. 9.7 - One pulley of diameter 36.0 cm revolves at 600...Ch. 9.7 - One pulley rotates at 450 rpm. The diameter of the...Ch. 9.7 - A pulley with a radius of 10.0 cm rotates at 120...Ch. 9.7 - Determine the direction of pulley B in each pulley...Ch. 9.7 - Determine the direction of pulley B in each pulley...Ch. 9.7 - Determine the direction of pulley B in each pulley...Ch. 9.7 - Determine the direction of pulley B in each pulley...Ch. 9.7 - Determine the direction of pulley B in each pulley...Ch. 9.7 - What size pulley should be placed on a...Ch. 9 - Angular velocity is measured in a....Ch. 9 - Power in the rotational system a. is found in the...Ch. 9 - A gear train has 13 directly connected gears. The...Ch. 9 - Distinguish between curvilinear motion and...Ch. 9 - Name the two types of measurement of rotation.Ch. 9 - In your own words, define radian.Ch. 9 - What is angular displacement? In what units is it...Ch. 9 - How is linear velocity of a point on a circle...Ch. 9 - How do equations for uniformly accelerated...Ch. 9 - A girl jumping from a high platform into a pool...Ch. 9 - Is the tangent to a circle always perpendicular to...Ch. 9 - Will inertia tend to keep a moving body following...Ch. 9 - Explain the relationship between the number of...Ch. 9 - How does the presence of an idler gear affect the...Ch. 9 - When the number of directly connected gears in a...Ch. 9 - How do pulley combination equations compare to...Ch. 9 - If a large pulley and a small pulley are connected...Ch. 9 - How do we know the belt connecting two pulleys...Ch. 9 - Convert 13 revolutions to (a) radians and...Ch. 9 - A bicycle wheel turns 25 rad during 45 s. Find the...Ch. 9 - A lawn tractor tire turns at 65.0 rpm and has a...Ch. 9 - A model plane pulls into a tight curve of a radius...Ch. 9 - A 0.950-kg mass is spun in a circle on a string of...Ch. 9 - A girl riding her bike creates a torque of 1.20 lb...Ch. 9 - A motor generates 300 W of power. The torque...Ch. 9 - Two rollers are side by side, with the large one...Ch. 9 - A clock is driven by a series of gears. The first...Ch. 9 - Two gears have 13 and 26 teeth, respectively. The...Ch. 9 - A gear train has 17 directly connected gears. Do...Ch. 9 - A pulley of diameter 14.0 cm is driven by an...Ch. 9 - A pulley of diameter 5.00 cm is driven at 100 rpm....Ch. 9 - If gear C turns counterclockwise, in what...Ch. 9 - Find the speed in rpm of gear D.Ch. 9 - Find the number of teeth in gear D.Ch. 9 - As part of their training, NASA astronauts are...Ch. 9 - Waterwheels are used to convert kinetic energy...Ch. 9 - A hairpin turn on a concrete racetrack has a...Ch. 9 - (a) How much power does a motorcycle need to...
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