Physics of Everyday Phenomena
9th Edition
ISBN: 9781260048469
Author: Griffith
Publisher: MCG
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Chapter 9, Problem 30CQ
If you blow between two limp pieces of paper held hanging down a few inches apart, will the pieces of paper come closer together or move farther apart? Explain.
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The magnitude of the net force exerted in the x direction on a 3.00-kg particle varies in time as shown in the figure below.
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(d) Find the average force exerted on the particle for the time interval between 0 and 5.00 s.
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What is the potential difference V2 across resistor 2 at (g) t = 0 and
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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.
Chapter 9 Solutions
Physics of Everyday Phenomena
Ch. 9 - Is it possible for a 100-lb woman to exert a...Ch. 9 - If we measure force in pounds (lb) and distance in...Ch. 9 - The same force is applied to two cylinders that...Ch. 9 - A penny and a quarter are embedded in the concrete...Ch. 9 - Prob. 5CQCh. 9 - The fluid in a hydraulic system pushes against two...Ch. 9 - If the output piston in a hydraulic pump exerts a...Ch. 9 - When a mercury barometer is used to measure...Ch. 9 - Could we use water instead of mercury to make a...Ch. 9 - Prob. 10CQ
Ch. 9 - Could we use water instead of mercury to make a...Ch. 9 - If you climbed a mountain carrying a mercury...Ch. 9 - If you filled an airtight balloon at the top of a...Ch. 9 - When you go over a mountain pass in an automobile,...Ch. 9 - The plunger of a sealed hypodermic syringe...Ch. 9 - Helium is sealed inside a balloon impermeable to...Ch. 9 - Is it possible for a solid metal ball to float in...Ch. 9 - A rectangular metal block is suspended by a string...Ch. 9 - Is it possible for a boat made of concrete to...Ch. 9 - A block of wood is floating in a pool of water. a....Ch. 9 - A large bird lands on a rowboat that is floating...Ch. 9 - Is it possible that some objects might float in...Ch. 9 - A rowboat is floating in a swimming pool when the...Ch. 9 - If an object has a smaller density than water,...Ch. 9 - A steady stream of water flowing in a narrow pipe...Ch. 9 - Why does the stream of water flowing from a faucet...Ch. 9 - Does a stream of liquid with a high viscosity flow...Ch. 9 - If the speed of flow in a stream decreases, is the...Ch. 9 - Why is the flow of smoke from a cigarette often...Ch. 9 - If you blow between two limp pieces of paper held...Ch. 9 - A wind gust blows sideways across an...Ch. 9 - A hair dryer can be used to create a stream of...Ch. 9 - Prob. 33CQCh. 9 - Does the path of a curveball really curve? (See...Ch. 9 - A force of 60 N pushes down on the movable piston...Ch. 9 - A 150-lb woman puts all of her weight on one heel...Ch. 9 - A 270-lb man supports all of his weight on a...Ch. 9 - Prob. 4ECh. 9 - In a hydraulic system, a force of 540 N is exerted...Ch. 9 - The load-bearing piston in a certain hydraulic...Ch. 9 - A column of water in a vertical pipe has a...Ch. 9 - With the temperature held constant, the pressure...Ch. 9 - With the temperature held constant, the piston of...Ch. 9 - A 0.52-kg block of wood is floating in water. What...Ch. 9 - A block of wood of uniform density floats so that...Ch. 9 - A certain boat displaces a volume of 8.3 m3 of...Ch. 9 - A rock with a volume of 0.3 m3 is fully submerged...Ch. 9 - A stream moving with a speed of 3.5 m/s reaches a...Ch. 9 - Water emerges from a faucet at a speed of 1.5 m/s....Ch. 9 - An airplane wing with an average cross-sectional...Ch. 9 - Suppose the input piston of a hydraulic jack has a...Ch. 9 - Prob. 2SPCh. 9 - A copper block with a density of 8960 kg/m3 is...Ch. 9 - A flat-bottomed wooden box is 2.8 m long and 1.3 m...Ch. 9 - A pipe with a circular cross-section has a...
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- 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.arrow_forwardIn 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_forward
- Consider a hoop of radius R and mass M rolling without slipping. Which form of kinetic energy is larger, translational or rotational?arrow_forwardA roller-coaster vehicle has a mass of 571 kg when fully loaded with passengers (see figure). A) If the vehicle has a speed of 22.5 m/s at point A, what is the force of the track on the vehicle at this point? B) What is the maximum speed the vehicle can have at point B, in order for gravity to hold it on the track?arrow_forwardThis one wheeled motorcycle’s wheel maximum angular velocity was about 430 rev/min. Given that it’s radius was 0.920 m, what was the largest linear velocity of the monowheel?The monowheel could not accelerate fast or the rider would start spinning inside (this is called "gerbiling"). The maximum angular acceleration was 10.9 rad/s2. How long, in seconds, would it take it to hit maximum speed from rest?arrow_forward
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- A 3.04-kg steel ball strikes a massive wall at 10.0 m/s at an angle of 0 = 60.0° with the plane of the wall. It bounces off the wall with the same speed and angle (see the figure below). If the ball is in contact with the wall for 0.234 s, what is the average force exerted by the wall on the ball? magnitude direction ---Select--- ✓ N xarrow_forwardYou are in the early stages of an internship at NASA. Your supervisor has asked you to analyze emergency procedures for extravehicular activity (EVA), when the astronauts leave the International Space Station (ISS) to do repairs to its exterior or perform other tasks. In particular, the scenario you are studying is a failure of the manned-maneuvering unit (MMU), which is a nitrogen-propelled backpack that attaches to the astronaut's primary life support system (PLSS). In this scenario, the astronaut is floating directly away from the ISS and cannot use the failed MMU to get back. Therefore, the emergency plan is to take off the MMU and throw it in a direction directly away from the ISS, an action that will hopefully cause the astronaut to reverse direction and float back to the station. You have the following mass data provided to you: astronaut: 78.1 kg, spacesuit: 36.8 kg, MMU: 115 kg, PLSS: 145 kg. Based on tests performed by astronauts floating "weightless" inside the ISS, the most…arrow_forwardThree carts of masses m₁ = 4.50 kg, m₂ = 10.50 kg, and m3 = 3.00 kg move on a frictionless, horizontal track with speeds of V1 v1 13 m 12 mq m3 (a) Find the final velocity of the train of three carts. magnitude direction m/s |---Select--- ☑ (b) Does your answer require that all the carts collide and stick together at the same moment? ○ Yes Ο Νο = 6.00 m/s to the right, v₂ = 3.00 m/s to the right, and V3 = 6.00 m/s to the left, as shown below. Velcro couplers make the carts stick together after colliding.arrow_forward
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