0 331 lecture Hwch6 Check my work the following table. The graph is also plotted. 23 BI 3.00 21.5 2.00 18.0 1.00 14.5 5.00 28.5

Physics

Work, power & energy Solutions

X R (BradshawRPHY1) / Homework 5, energy 21-22 / View Jordan d will compress. After compressing the spring, the block will slide up the plane to some maxi- mum height, ha, after which it will again slide back down. How much work is done on the block be- tween its release at height h and its ascent to its next maximum height? 1. 303.521 2. 429.05 3. 360.44 4. 300 5. 665.742 6. 440.964 7. 396.296 8. 420.37 9. 405 10084.36 Answer in units of N/m. 1. 2u magha 2. None of these 3. Magh-hA) +2j1 magha 4.0 5. More information is needed. 022 (part 2 of 2) 10.0 points Find the work done in stretching the spring 1. 0.54439 2. 6.73465 3. 3.216 4. 1.51704 5. 5.5161 6. 4.2012 7. 3.996 8. 5.9696 9. 1.2285 6. mag (h - ha) 10. 2.454 020 10.0 points An elevator of mass m is initially at resto the first floor of a building. It moves upward, and passes the second and third floors with a constant velocity, and finally stops at the fourth floor. The distance between adjacent floors is h. What is the net work done on the elevator during the entire trip, from the first floor to the fourth floor? wer in unsur J. 1. W = -3 mgh 2. W=3mgh 3. W=0 023 10.0 por A cheerleader its his 41.3 kg partner steht up off the ground a distance of 0.285 m befo releasing her. Assume the partner's velocity is zero at the beginning and the end of the lift. The acceleration of gravity is 9.8 m/s. If he does this 15 times, how much work has he done? 1. 16134.7 2. 3003.03 3. 1657.98 4. 4360.38 5. 6223.77 7624.8 7. 9514.35 8. 1730.26 10218.8 7837.24 wer in units of J. 4. W = -4mgh 5. Wmeh 6. None of these. 021 (part 1 of 2) 10.0 points The force required to stretch a Hooke's law spring varies from O N to 68.1 N as we stretch the spring by moving one end 16.2 cm from (part 1 of 3) 10.0 points

Physics

Work, power & energy Solutions

WPE 1.7 Establish the equations. Solve for the necessary variable. Plug-N-Chug. Express answers to 3+SF. Imm) The Oinga-Boinga Cowabunga 33 m 18m Ba 11 m 11.5m Car Mass = 600kg Spring Const = 12000 Nm Max Spring Compression: 10m No Friction Spring's Max Compression - 6,6 meters The roller coaster's car starts from rest. 1. What is the speed of the car after it just loses contact with the spring at the top of the first hill? 2. What is the speed of the car when it is 18 meters above the ground? 3. What is the speed of the car as it enters the loop? 4. How many g's are felt by the rider as the car enters the loop? 5. What is the speed of the car when it reaches the top of the loop? 6. How many g's are felt by the rider at this point loop? 7. What is the speed of the car as the instant before it makes contact with the spring on the right? 8. What is the right spring's spring constant? 9. What is the speed of the car after the spring has been compressed 4.0 m from equilibrium? 10. What average force did the spring exert to stop the car? 11. How much time did it take to stop the car? 12. How much power was used by the spring to stop the car?

Physics

Work, power & energy Solutions

14. [-11 Points] DETAILS SERCP115.7.P.053. MY NOTES ASK YOUR TEACHER PRACTICE ANOT The electric motor of a model train accelerates the train from rest to 0.700 m/s in 29.0 ms. The total mass of the train is 635 g. Find the average power delivered to the train during its acceleration. W Need Help? Read It