College Physics: A Strategic Approach Technology Update, Books a la Carte Plus Mastering Physics with Pearson eText -- Access Card Package (3rd Edition)
3rd Edition
ISBN: 9780134201979
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
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Chapter 9, Problem 17P
A 10,000 kg railroad car is rolling at 2.00 m/s when a 4000 kg load of gravel is suddenly dropped in. What is the car’s speed just after the gravel is loaded?
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Figure 27-65 Problem 63.
Thor flies by spinning his hammer really fast from a leather strap at the end of the handle, letting go, then grabbing it and having it pull him. If Thor wants to reach escape velocity (velocity needed to leave Earth’s atmosphere), he will need the linear velocity of the center of mass of the hammer to be 11,200 m/s. Thor's escape velocity is 33532.9 rad/s, the angular velocity is 8055.5 rad/s^2. While the hammer is spinning at its maximum speed what impossibly large tension does the leather strap, which the hammer is spinning by, exert when the hammer is at its lowest point? the hammer has a total mass of 20.0kg.
If the room’s radius is 16.2 m, at what minimum linear speed does Quicksilver need to run to stay on the walls without sliding down? Assume the coefficient of friction between Quicksilver and the wall is 0.236.
Chapter 9 Solutions
College Physics: A Strategic Approach Technology Update, Books a la Carte Plus Mastering Physics with Pearson eText -- Access Card Package (3rd Edition)
Ch. 9 - Rank in order, from largest to smallest, the...Ch. 9 - Starting from rest, object 1 is subject to a 12 N...Ch. 9 - A 0.2 kg plastic cart and a 20 kg lead cart can...Ch. 9 - Two pucks, of mass m and 4m, lie on a frictionless...Ch. 9 - Prob. 5CQCh. 9 - Two students stand at rest, facing each other on...Ch. 9 - A 2 kg cart rolling to the right at 3 m/s runs...Ch. 9 - Automobiles are designed with crumple zones...Ch. 9 - You probably know that it feels better to catch a...Ch. 9 - In the early days of rocketry, some people claimed...
Ch. 9 - Two ice skaters, Megan and Jason, push off from...Ch. 9 - Suppose a rubber ball and a steel ball collide....Ch. 9 - While standing still on a basketball court, you...Ch. 9 - To win a prize at the county fair, youre trying to...Ch. 9 - Rank in order, from largest to smallest, the...Ch. 9 - Monica stands at the edge of a circular platform...Ch. 9 - If the earth warms significantly, the polar ice...Ch. 9 - The disks shown in Figure Qg.181 have equal mass....Ch. 9 - Curling is a sport played with 20 kg stones that...Ch. 9 - Two balls are hung from cords. The first ball, of...Ch. 9 - Figure Q9.21 shows two blocks sliding on a...Ch. 9 - Two friends are sitting in a stationary canoe. At...Ch. 9 - Two blocks, with masses m1, = 2.5 kg and m2 = 14...Ch. 9 - A small puck is sliding to the right with...Ch. 9 - A red ball, initially at rest, is simultaneously...Ch. 9 - A 4.0-m-diameter playground merry-go-round, with a...Ch. 9 - A disk rotates freely on a vertical axis with an...Ch. 9 - At what speed do a bicycle and its rider, with a...Ch. 9 - A 57 g tennis ball is served at 45 m/s. If the...Ch. 9 - A student throws a 120 g snowball at 7.5 m/s at...Ch. 9 - In Figure P9.4, what value of Fmax gives an...Ch. 9 - A sled and rider, gliding over horizontal,...Ch. 9 - Use the impulse-momentum theorem to find how long...Ch. 9 - a. A 2.0 kg object is moving to the right with a...Ch. 9 - A 60 g tennis ball with an initial speed of 32 m/s...Ch. 9 - A child is sliding on a sled at 1.5 m/s to the...Ch. 9 - An ice hockey puck slides along the ice at 12 m/s....Ch. 9 - As part of a safety investigation, two 1400 kg...Ch. 9 - In a Little League baseball game, the 145 g ball...Ch. 9 - A small, 100 g cart is moving at 1.20 m/s on a...Ch. 9 - A man standing on very slick ice fires a rifle...Ch. 9 - A 2.7 kg block of wood sits on a frictionless...Ch. 9 - A strong man is compressing a lightweight spring...Ch. 9 - A 10,000 kg railroad car is rolling at 2.00 m/s...Ch. 9 - A 5000 kg t rain car, with its top open, is...Ch. 9 - A 55 kg hunter, standing on frictionless ice,...Ch. 9 - A 9.5 kg dog takes a nap in a canoe and wakes up...Ch. 9 - Prob. 21PCh. 9 - A 71 kg baseball player jumps straight up to catch...Ch. 9 - A kid at the junior high cafeteria wants to propel...Ch. 9 - The parking brake on a 2000 kg Cadillac has...Ch. 9 - A 2.0 kg block slides along a frictionless surface...Ch. 9 - Erica (36 kg) and Danny (47 kg) are bouncing on a...Ch. 9 - At a wild-west show, a marksman fires a bullet at...Ch. 9 - A 20 g ball of clay traveling east at 3.0 m/s...Ch. 9 - Two particles collide and bounce apart. Figure...Ch. 9 - A 20 g ball of clay traveling east at 2.0 m/s...Ch. 9 - A firecracker in a coconut blows the coconut into...Ch. 9 - What is the angular momentum of the moon around...Ch. 9 - A little girl is going on the merry-go-round for...Ch. 9 - What is the angular momentum about the axle of the...Ch. 9 - What is the angular momentum about the axle of the...Ch. 9 - Divers change their body position in midair while...Ch. 9 - Prob. 37PCh. 9 - What is the impulse on a 3.0 kg particle that...Ch. 9 - A 600 g air-track glider collides with a spring at...Ch. 9 - Far in space, where gravity is negligible, a 425...Ch. 9 - A 200 g ball is dropped from a height of 2.0 m,...Ch. 9 - A 200 g ball is dropped from a height of 2.0 m and...Ch. 9 - Figure P9.43 is a graph of the force exerted by...Ch. 9 - A sled slides along a horizontal surface for which...Ch. 9 - A 140 g baseball is moving horizontally to the...Ch. 9 - Squids rely on jet propulsion, a versatile...Ch. 9 - The flowers of the bunchberry plant open with...Ch. 9 - a. With what speed are pollen grains ejected from...Ch. 9 - A tennis player swings her 1000 g racket with a...Ch. 9 - A 20 g ball of clay is thrown horizontally at 30...Ch. 9 - Dan is gliding on his skateboard at 4.0 m/s. He...Ch. 9 - James and Sarah stand on a stationary cart with...Ch. 9 - Ethan, whose mass is 80 kg, stands at one end of a...Ch. 9 - A small cart rolls freely along the floor. As it...Ch. 9 - Three identical train cars, coupled together, are...Ch. 9 - A 110 kg linebacker running at 2.0 m/s and an 82...Ch. 9 - Most geologists believe that the dinosaurs became...Ch. 9 - Two ice skaters, with masses of 75 kg and 55 kg,...Ch. 9 - Prob. 59GPCh. 9 - One billiard ball is shot east at 2.00 m/s. A...Ch. 9 - A 10 g bullet is fired into a 10 kg wood block...Ch. 9 - A typical raindrop is much more massive than a...Ch. 9 - A 15 g bullet is fired at 610 m/s into a 4.0 kg...Ch. 9 - Two 500 g blocks of wood are 2.0 m apart on a...Ch. 9 - A 495 kg cannon fires a 10.0 kg cannonball with a...Ch. 9 - Laura, whose mass is 35 kg, jumps horizontally off...Ch. 9 - A spaceship of mass 2.0 106 kg is cruising at a...Ch. 9 - At the county fair, Chris throws a 0.15 kg...Ch. 9 - Figure P9.70 shows a collision between three balls...Ch. 9 - The carbon isotope 14C is used for carbon dating...Ch. 9 - A 1.0-m-long massless rod is pivoted at one end...Ch. 9 - A 200 g puck revolves in a circle on a...Ch. 9 - Figure P9.74 shows a 100 g puck revolving at 100...Ch. 9 - A 2.0 kg, 20-cm-diameter turntable rotates at 100...Ch. 9 - Joey, from Example 9.10, stands at rest at the...Ch. 9 - A 3.0-m-diameter merry-go-round with a mass of 250...Ch. 9 - Disk A, with a mass of 2.0 kg and a radius of 40...Ch. 9 - Consider a golf club hitting a golf ball. To a...Ch. 9 - Consider a golf club hitting a golf ball. To a...Ch. 9 - Consider a golf club hitting a golf ball. To a...Ch. 9 - Consider a golf club hitting a golf ball. To a...
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- In the comics Thor flies by spinning his hammer really fast from a leather strap at the end of the handle, letting go, then grabbing it and having it pull him. If Thor wants to reach escape velocity (velocity needed to leave Earth’s atmosphere), he will need the linear velocity of the center of mass of the hammer to be 11,200 m/s. A) If the distance from the end of the strap to the center of the hammer is 0.334 m, what angular velocity does Thor need to spin his hammer at to reach escape velocity? b) If the hammer starts from rest what angular acceleration does Thor need to reach that angular velocity in 4.16 s? c) While the hammer is spinning at its maximum speed what impossibly large tension does the leather strap, which the hammer is spinning by, exert when the hammer is at its lowest point? The hammer has a total mass of 20.0kg.arrow_forwardThe car goes from driving straight to spinning at 10.6 rev/min in 0.257 s with a radius of 12.2 m. The angular accleration is 4.28 rad/s^2. During this flip Barbie stays firmly seated in the car’s seat. Barbie has a mass of 58.0 kg, what is her normal force at the top of the loop?arrow_forwardConsider a hoop of radius R and mass M rolling without slipping. Which form of kinetic energy is larger, translational or rotational?arrow_forward
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