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Part A To stretch a certain spring by 2.40 cm from its equilibrium position requires 7.00 J of work. What is the force constant of this spring? Express your answer in newtons per meter. IVO K= 27777 N/m Submit Previous Answers Request Answer X Incorrect; Try Again; 19 attempts remaining Part B What was the maximum force required to stretch it by that distance? Express your answer in newtons. IVO AEd ? F = N Submit Request AnswerPart A A 2.50 kg mass is pushed against a horizontal spring of force constant 28.0 N/cm on a frictionless air table. The spring is attached to the tabletop, and the mass is not attached to the spring in any way. Find the greatest speed the mass reaches. When the spring has been compressed enough to store 11.0 J of potential energy in it, the mass is suddenly released from rest. Express your answer with the appropriate units. HA POO ? Umax= Value Units Submit Request Answer Part B Complete previous part(s) Part C What is the greatest acceleration of the mass? Express your answer with the appropriate units. HA Cmax = Value Units Submit Request Answer Part D Complete previous part(s)Part A Marbles of mass m are thrown from the edge of a vertical cliff of height h at speed vo. Neglecting air resistance, how fast (in terms of m, h, and vo) will these marbles be moving when they reach the bottom of the cliff if they are thrown straight up? Express your answer in terms of some or all of the variables m, h, vo, and gravitational acceleration g. *0 ? Submit Request Answer Part B Neglecting air resistance, how fast (in terms of m, h, and vo) will these marbles be moving when they reach the bottom of the cliff if they are thrown straight down? Express your answer in terms of some or all of the variables m, h, vo, and gravitational acceleration g. AEd Submit Request Answer Part C Neglecting air resistance, how fast (in terms of m, h, and vo) will these marbles be moving when they reach the bottom of the cliff if they are thrown horizontally away from the cliff? Express your answer in terms of some or all of the variables m, h, vo, and gravitational acceleration g. hFOE? Submit Request AnswerPart A A 2.30 kg brick is sliding along on a rough horizontal surface at 14.5 m/s. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of If the brick stops in 4.70 s, how much mechanical energy is lost? Work and energy on an air track. Express your answer in joules. AEd 0 ? 14 Emech | = 210125 Submit Previous Answers Request Answer * Incorrect; Try Again; 19 attempts remaining Provide FeedbackPart A Suppose you were to drop a 12 1b bowling ball from the top of the Empire State Building, which is about 440 m tall, onto a machine that would catch it and then convert its kinetic energy into electrical energy. For how long could the resulting energy light a 110 W light bulb? Express your answer in seconds. IVO AEd S Submit Request Answer Part B Is it actually possible to convert mechanical energy to electrical energy with 100% efficiency? Yes O No Submit Request Answer Provide FeedbackPart A An elevator has mass 510 kg, not including passengers. The elevator is designed to ascend, at constant speed, a vertical distance of 22.0 m (five floors) in 15.8 s, and it is driven by a motor that can provide up to 45 hip to the elevator. What is the maximum number of passengers that can ride in the elevator? Assume that an average passenger has mass 65.0 kg. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Express your answer as an integer. A marathon stair climb. AEd n= Submit Request Answer Provide Feedback