A penny is placed on a turntablewhich is spinning clockwise as shownin Fig. 5-37. If the power to theturntable is turned off, which arrowbest represents the direction of theacceleration of the penny at point Pwhile the turntable is still spinningbut slowing down?OPFIGURE 5–37MisConceptualQuestion 12.(a)(b)(c)(d)(e)

The penny is rotating around the turntable, due to which a centripetal force acts on it towards the…

Answered: A penny is placed on a turntable which…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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4. A cylinder [Im = MR/2] starts from rest at height H at the upper end of the track shown, and rolls without slipping until H leaving the horizontal portion of track at height h as shown. (a) What is the cylinder's linear speed as it leaves the track? (b) How does its kinetic energy associated with this speed compare to its change in gravitational potential energy from H to h? (c) How far to the right does the cylinder land from the end of the track?
Q-6: A 10 kg cylinder rolls along a horizontal floor so that the cylinder's center of mass has a speed of 5 m/s. How much work must be done on the hoop to stop it? A) 25 J B) 63 J C)-125 J D) -188 J E)-375 J
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Answer detailly 7(iii)
During a very quick stop, a car decelerates at 12 (a) What is the angular acceleration of its 0.27 m radius tires, assuming they do not slip on the pavement? Hint: Don't forget the sign. a = S rad S² (b) How many revolutions do the tires make before coming to rest, given their initial angular velocity rad is 98 -? 3 revolutions (c) How long does the car take to stop completely? t = S
In which of the following situations is the angular acceleration equal to zero? Mark only one. O A fan in the process of slowing from its maximum spin to zero. A ball rolling down a hill A merry-go-round that starts at rest and is pushed by a child until it speeds up O The tire of a car that is traveling at a constant speed in a straight line.
1. For this series of 4 questions, a rider rides in a car that is connected to a 4-m rod, and rotates about the z axis. The rod of negligible mass is subjected to a constant couple moment of M, and the engine of the car supplies a traction force of F. Neglect the size of the car. You will be asked to solve for different things. Please pay attention: the numbers may change from problem to problem since they are randomized. 3) If the rod is subjected to a constant couple moment of M = 800 N•m, and the engine of the car supplies a traction force of F=11•t N to the wheels, where tis in seconds, what is the magnitude of the angular impulse from the moment and the force to the car-rider system in kg•m²/s from t = 0 to t = 5.7 s? Your answer must include 1 place after the decimal point. Your Answer: Answer M 4 m F
Thomas Bradshaw invented the first Merry-Go-Round to be operated by a steam engine. If the engine suddenly stopped, and the Merry Go Round experienced no friction or air resistance, how could the riders on the ride slow its rotational motion? Run toward the edge of the platform. Run toward the center of the platform. Jump off the ride all at once. Lay down flat on the platform.
3. A ball rolls along the smooth frictionsless track shown in in the figure below with an initial speed of 5.00 m/s. Assume that the ball turns all the corners smoothly with no loss of speed. Calculate to three significant figures despite what the figure shows. (a) What is the ball’s speed as it goes over the top? (b) What is its speed when it reaches the level track on the right side? (c) What is the difference between the final speed and the initial speed?
7
MY NOTES ASK A car initially traveling at 24.2 m/s undergoes a constant negative acceleration of magnitude 1.70 m/s after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires have radii of 0.345 m? X rev (b) What is the angular speed of the wheels when the car has traveled half the total distance? X rad/s Submit Answer 10. [2/2 Points] DETAILS PREVIOUS ANSWERS SERCP11 7.4.P.020. MY NOTES ASK YC Human centrifuges are used to train military pilots and astronauts in preparation for hiigh-g maneuvers. A trained, fit person wearing a g-suit can withstand accelerations up (88.2 m/s) without losing consciousness.

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