Quiz: Chapter 10 1 Question 1 of 10 > -/10 L: on. View Policies Current Attempt in Progress In a room that is 2.44 m high, a spring (unstrained length = 0.30 m) hangs from the ceiling. A board whose length is 1.02 m is attached to the free end of the spring. The board hangs straight down, so that its 1.02-m length is perpendicular to the oor. The weight of the board (154 N) stretches the spring so that the lower end of the board just extends to, but does not touch, the oori What is the spring constant of the spring? Number n Units v Question 2 of 10 - / 10 E View Policies Current Attempt in Progress Atoms in a solid are not stationary, but vibrate about their equilibrium positions. Typically, the frequency of vibration is about f= 2.62 x 1012 Hz, and the amplitude is about 3.32 x 10'11 m. For a typical atom, what is its (a) maximum speed and (b) maximum acceleration? (a) Number I Units v (b) Number Units v Question30f10 -/10 E View Policies Current Attempt in Progress Multiple-Concept Example 6 presents a model for solving this problem. As far as vertical oscillations are concerned, a certain automobile can be considered to be mounted on four identical springs, each having a spring constant of 1.37 x 105 N/m. Then, four identical passengers are seated in the car, and it is set into a vertical oscillation that has a period of 0.367 5. If the mass of the empty car is 1610 kg, determine the mass of each passenger. Assume that the mass of the car and its passengers is distributed evenly over the springs. Number n Units v Question4of'IO -/10 :2 View Policies Current Attempt in Progress To answer this question, rst click here to view the associated video. A vertical spring is mounted to a table and compressed downward. A ball of mass m is placed on a spring (spring constant k l, the spring is released, and the ball is projected vertically upward. In which case would you expect the ball to reach the greatest maximum height? 0 Reduce the mass of the ball by a factor of two 0 Compress the spring twice as much 0 Decrease the spring constant by a factor of two 0 Increase the spring constant by a factor of two A ball is dropped from some height onto an unstrained vertical spring {mounted to a tabletop) and compresses it. Consider an instant where the spring has not yet brought the ball to a halt, but is still in the process of compressing. What types of energies are associated with the spring-ball system at that instant? Assume that the zero of gravitational energy is at the level of the tabletop. O Gravitational, kinetic, and elastic O Gravitational and elastic O Gravitational and kinetic 0 Kinetic and elastic to. n'mcn 5 Of'lO -/10 35 Next question View Policies Current Attempt in Progress The period of a simple pendulum is 3.3 s. The length of the pendulum is doubled. What is the period Tof the longer pendulum? T=Number I Units v Question 6 oflO -f 10 '5 View Policies Current Attempt in Progress To answer this question, fl rst click here to view the associated video. The piston of a shock absorber moves through oil in order to damp the motion of the car's chassis when it hits a bump. Holes in the piston head allow the oil to ow through it. Suppose the oil gets \"stiffer" when it gets cold outside. Which one of the following do you expect in cold weather? 0 The degree of damping will decrease (the car will oscillate more when it hits bumps) O The degree of damping will be the same (your ride will be the same as in warm weather) 0 The degree of damping will be greater (the car will oscillate less when it hits bumps] Suppose a simple pendulum is submerged in water. If the mass is raised to a height [1 above its lowest position and released, how many oscillations does it undergo if it is critically damped? 0 It depends on the length of the pendulum. 0 It will not oscillate at all. C) It depends on the specic value of h. 000 Question 7 ole / 10 E 000 View Policies Next question Current Attempt in Progress An external force (in addition to the spring force) is continually applied to an object of mass m attached to a spring that has a spring constant k. The frequency of this external force is such that resonance occurs. Then the frequency of this external force is doubled, and the force is applied to one of the spring systems shown in the drawings. With which one would resonance occur? A B C D E 8k 2k 4k 9k 1 0k OE OD CC OB OA Question 8 of 10 - / 10 E ... View Policies Current Attempt in Progress Elastic therapeutic tape, also called kineso tape or KT-tape, consists of an elastic cotton weave with an adhesive backing. It is placed directly on the skin to provide support to injured or painful joints, pulled muscles, and other ailments (see the photo). While there is no definitive scientific evidence that KT-tape offers significant health benefits, its popularity surged after many athletes wore it in the 2008 Olympic Games. Standard KT-tape is 5.08 cm wide and 0.180 mm thick. One end of a 10.0-cm length of KT-tape is hung from the ceiling, and a 1.00-kg mass is attached to the other end causing the tape to stretch by 2.14 mm. What is the Young's modulus of the tape? barang/Shutterstock.com Number Units VQuestion 9 of 10 > - / 10 E ... View Policies Current Attempt in Progress A material has a shear modulus of 5.0 x 109 N/m2. A shear stress of 1.9 x 107 N/m2 is applied to a piece of the material. What is the resulting shear strain? Shear strain = iQuestion 10 of 10