C Intro X Sign x G resid X ads Resid X (46) ( X (55) ( X ) Psaul X D21 6 1 X Ceng X VA Mod X Cour X Cour X V X webassign net web Student Assignment Responses last dep 30689990 Update G Gmail YouTube Maps Tendances TV fuboTV Watch 3 Google TRIP TO SPAIN Enroll Apple Devell Settings ) Les liens de Fidel C Other bookmarks 3 4 Points DETAILS OSCOLPHYS2016 7 4 WA 029 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You have a light spring which obeys Hooke's law This spring stretches 3 28 cm vertically when a 2 30 kg object is suspended from it Determine the following (a) the force constant of the spring (in N m) N m (b) the distance (in cm) the spring stretches if you replace the 2 30 kg object with a 1 15 kg object cm (c) the amount of work (in ) an external agent must do to stretch the spring 9 00 cm from its unstretched position Additional Materials Reading BO Search O a T O 12 28 PM W ENG US 2 9 2023 5 Mostly cloudyC Intro X Sign X G resid X as Resid X (46) ( X (55) ( X ) Psaul X D21 6 1 0 X Ceng X VA Mod X Cour X Cour X V X C A webassign net web Student Assignment Responses last dep 30689990 Update G Gmail YouTube Maps Tendances TV fuboTV Watch Other bookmarks 4 4 Points DETAILS OSCOLPHYS2016ACC 7 5 P 025 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) How high (in m) a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 110 km h (Enter a number ) m (b) If, in actuality, a 750 kg car with an initial speed of 110 km h is observed to coast up a hill to a height 26 0 m above its starting point, how much thermal energy (in ) was generated by friction (Enter a number ) (c) What is the average force of friction (down the slope) if the hill has a slope 2 50 above the horizontal (Enter your answer in N Enter a number ) IN 5 4 Points DETAILS OSCOLPHYS2016 7 5 WA 036 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 67 9 kg boy is surfing and catches a wave which gives him an initial speed of 1 60 m s He then drops through a height of 1 63 m, and ends with a speed of 8 51 m s How much nonconservative work (in kJ) was done on the boy KJ Additional Materials Reading 80 F Mostly cloudy Search O a T W ENG 12 28 PM US 2 9 2023 5C Intro X Sign X G resid X as Resid X (46) ( X (55) ( X ) Psaul X D21 6 1 X Ceng X VA Mod X Cour X Cour X V X C A webassign net web Student Assignment Responses last dep 30689990 Update G Gmail YouTube Maps Tendances TV fuboTV Watch Google TRIP TO SPAIN Enroll Apple Devell Settings ) Les liens de Fidel C Other bookmarks 6 4 Points DETAILS OSCOLPHYS2016 7 6 WA 049 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A man on a motorcycle plans to make a jump as shown in the figure h If he leaves the ramp with a speed of 40 0 m s and has a speed of 37 9 m s at the top of his trajectory, determine his maximum height (h) (in m) above the end of the ramp Ignore friction and air resistance m Additional Materials Reading 80 F O 12 28 PM Search a T W ENG US 2 9 2023 5 Mostly cloudyC Intro X Sign x G resid X as Resid X (46) ( X (55) ( X ) Psaul X D2L 6 10 X VA Mod X Cour X Cour X (66) 1 X V X webassign net web Student Assignment Responses submit dep 30689990 tags autosave question3572613 5 Update G Gmail YouTube Maps Tendances TV fuboTV Watch 3 Google TRIP TO SPAIN Enroll Apple Devell Settings Les liens de Fidel C Other bookmarks 7 4 Points DETAILS OSCOLPHYS2016 7 6 WA 052 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 5 90 kg object falls freely (ignore air resistance), after being dropped from rest Determine the initial kinetic energy (in ), the final kinetic energy (in J), and the change in kinetic energy (in ) for the following (a) the first meter of the fall initial kinetic energy final kinetic energy change in kinetic energy (b) the second meter of the fall initial kinetic energy final kinetic energy U change in kinetic energy U Additional Materials Reading BO 7 00 PM Mostly cloudy Search O a W A ENG 2 9 2023 5 USC Intro X Sign X G resid X ads Resid X (46) ( X (55) ( X ) Psaul X D2L 6 10 X VA Mod X Cour X Cour X (66) 1 X V X C webassign net web Student Assignment Responses submit dep 30689990 tags autosave question3572613 5 Update G Gmail YouTube Maps Tendances TV fuboTV Watch Google TRIP TO SPAIN Enroll Apple Devell Settings Les liens de Fidel C Other bookmarks 8 4 Points DETAILS OSCOLPHYS2016ACC 7 7 P 039 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) Find the useful power output (in W) of an elevator motor that lifts a 2800 kg load a height of 35 0 m in 12 0 s, if it also increases the speed from rest to 4 00 m s Note that the total mass of the counterbalanced system is 10,000 kg so that only 2800 kg is raised in height, but the full 10,000 kg is accelerated (Enter a number ) W (b) What does it cost (in cents), if electricity is $0 0900 per kW h (Enter a number ) cents 9 4 Points DETAILS OSCOLPHYS2016ACC 7 8 P 047 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) What is the efficiency of an out of condition professor who does 2 10 x 10j of useful work while metabolizing 500 kcal of food energy (Enter your answer as a percentage Enter a number ) (b) How many food calories (in kcal) would a well conditioned athlete metabolize in doing the same work with an efficiency of 25 (Enter a number ) kcal BO Search O a W ENG 7 01 PM 5 Mostly cloudy US 2 9 2023C Intro X Sign X G resid X as Resid X (46) ( X (55) ( X ) Psaul X D2L 6 10 X VA Mod X Cour X Cour X (66) 1 X V X webassign net web Student Assignment Responses submit dep 30689990 tags autosave question3572613 5 Update G Gmail YouTube Maps Tendances TV fuboTV Watch 3 Google TRIP TO SPAIN Enroll Apple Devell Settings Les liens de Fidel C Other bookmarks 10 4 Points DETAILS OSCOLPHYS2016 7 9 P 060 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) Calculate the force (in N) the woman in the figure below exerts to do a push up at constant speed, taking all data to be known to three digits (You may need to use torque methods from a later chapter ) m 62 kg CG W 0 88 m Freaction 1 47 m N (b) How much work (in ) does she do if her center of mass rises 0 260 m (c) What is her useful power output (in W) if she does 30 push ups in 1 min (Should work done lowering her body be included See the discussion of useful work in Work, Energy, and Power in Humans ) W Additional Materials Reading 80 F Search O a T W ENG 7 01 PM A Mostly cloudy US 2 9 2023 5

Question

C Intro X Sign x G resid X ads Resid X (46) ( X (55) ( X ) Psaul X D21 6 1   X Ceng X VA Mod X Cour X   Cour X   V X webassign net web Student Assignment Responses last dep 30689990 Update G Gmail YouTube   Maps Tendances TV fuboTV   Watch      3 Google TRIP TO SPAIN Enroll   Apple Devell   Settings ) Les liens de Fidel C       Other bookmarks 3     4 Points  DETAILS OSCOLPHYS2016 7 4 WA 029  MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER You have a light spring which obeys Hooke's law  This spring stretches 3 28 cm vertically when a 2 30 kg object is suspended from it  Determine the following  (a) the force constant of the spring (in N m) N m (b) the distance (in cm) the spring stretches if you replace the 2 30 kg object with a 1 15 kg object cm (c) the amount of work (in  ) an external agent must do to stretch the spring 9 00 cm from its unstretched position Additional Materials Reading BO Search O a T O 12 28 PM W ENG US 2 9 2023 5 Mostly cloudyC Intro X Sign X G resid X as Resid X (46) ( X (55) ( X ) Psaul X D21 6 1 0 X Ceng X VA Mod X Cour X   Cour X   V X   C A webassign net web Student Assignment Responses last dep 30689990 Update G Gmail YouTube   Maps Tendances TV fuboTV   Watch        Other bookmarks 4     4 Points  DETAILS OSCOLPHYS2016ACC 7 5 P 025  MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) How high (in m) a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 110 km h  (Enter a number ) m (b) If, in actuality, a 750 kg car with an initial speed of 110 km h is observed to coast up a hill to a height 26 0 m above its starting point, how much thermal energy (in  ) was generated by friction  (Enter a number ) (c) What is the average force of friction (down the slope) if the hill has a slope 2 50 above the horizontal  (Enter your answer in N  Enter a number ) IN   5     4 Points  DETAILS OSCOLPHYS2016 7 5 WA 036  MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 67 9 kg boy is surfing and catches a wave which gives him an initial speed of 1 60 m s  He then drops through a height of 1 63 m, and ends with a speed of 8 51 m s  How much nonconservative work (in kJ) was done on the boy  KJ Additional Materials Reading 80 F Mostly cloudy Search O a T W ENG 12 28 PM US 2 9 2023 5C Intro X Sign X G resid X as Resid X (46) ( X (55) ( X ) Psaul X D21 6 1   X Ceng X VA Mod X Cour X   Cour X   V X   C A webassign net web Student Assignment Responses last dep 30689990 Update G Gmail YouTube   Maps Tendances TV fuboTV   Watch        Google TRIP TO SPAIN Enroll   Apple Devell   Settings ) Les liens de Fidel C      Other bookmarks 6     4 Points  DETAILS OSCOLPHYS2016 7 6 WA 049  MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A man on a motorcycle plans to make a jump as shown in the figure  h If he leaves the ramp with a speed of 40 0 m s and has a speed of 37 9 m s at the top of his trajectory, determine his maximum height (h) (in m) above the end of the ramp  Ignore friction and air resistance  m Additional Materials Reading 80 F O 12 28 PM Search a T W ENG US 2 9 2023 5 Mostly cloudyC Intro X Sign x G resid X as Resid X (46) ( X (55) ( X ) Psaul X D2L 6 10 X VA Mod X   Cour X Cour X (66) 1 X   V X webassign net web Student Assignment Responses submit dep 30689990 tags autosave question3572613 5 Update G Gmail YouTube   Maps Tendances TV fuboTV   Watch      3 Google   TRIP TO SPAIN   Enroll   Apple Devell   Settings Les liens de Fidel C       Other bookmarks 7     4 Points  DETAILS OSCOLPHYS2016 7 6 WA 052  MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 5 90 kg object falls freely (ignore air resistance), after being dropped from rest  Determine the initial kinetic energy (in  ), the final kinetic energy (in J), and the change in kinetic energy (in  ) for the following (a) the first meter of the fall initial kinetic energy final kinetic energy change in kinetic energy (b) the second meter of the fall initial kinetic energy final kinetic energy U change in kinetic energy U Additional Materials Reading BO 7 00 PM Mostly cloudy Search O a W A ENG 2 9 2023 5 USC Intro X Sign X G resid X ads Resid X (46) ( X (55) ( X ) Psaul X D2L 6 10 X VA Mod X   Cour X Cour X (66) 1 X   V X   C webassign net web Student Assignment Responses submit dep 30689990 tags autosave question3572613 5 Update G Gmail YouTube   Maps Tendances TV fuboTV   Watch        Google   TRIP TO SPAIN   Enroll   Apple Devell   Settings Les liens de Fidel C       Other bookmarks 8     4 Points  DETAILS OSCOLPHYS2016ACC 7 7 P 039  MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) Find the useful power output (in W) of an elevator motor that lifts a 2800 kg load a height of 35 0 m in 12 0 s, if it also increases the speed from rest to 4 00 m s  Note that the total mass of the counterbalanced system is 10,000 kg so that only 2800 kg is raised in height, but the full 10,000 kg is accelerated  (Enter a number ) W (b) What does it cost (in cents), if electricity is $0 0900 per kW   h  (Enter a number ) cents 9     4 Points  DETAILS OSCOLPHYS2016ACC 7 8 P 047  MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) What is the efficiency of an out of condition professor who does 2 10 x 10j of useful work while metabolizing 500 kcal of food energy  (Enter your answer as a percentage  Enter a number )   (b) How many food calories (in kcal) would a well conditioned athlete metabolize in doing the same work with an efficiency of 25   (Enter a number ) kcal BO Search O a W ENG 7 01 PM 5 Mostly cloudy US 2 9 2023C Intro X Sign X G resid X as Resid X (46) ( X (55) ( X ) Psaul X D2L 6 10 X VA Mod X   Cour X Cour X (66) 1 X   V X webassign net web Student Assignment Responses submit dep 30689990 tags autosave question3572613 5 Update G Gmail YouTube   Maps Tendances TV fuboTV   Watch      3 Google   TRIP TO SPAIN   Enroll   Apple Devell   Settings Les liens de Fidel C      Other bookmarks 10     4 Points  DETAILS OSCOLPHYS2016 7 9 P 060  MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) Calculate the force (in N) the woman in the figure below exerts to do a push up at constant speed, taking all data to be known to three digits  (You may need to use torque methods from a later chapter ) m   62 kg CG W 0 88 m Freaction 1 47 m N (b) How much work (in  ) does she do if her center of mass rises 0 260 m  (c) What is her useful power output (in W) if she does 30 push ups in 1 min  (Should work done lowering her body be included  See the discussion of useful work in Work, Energy, and Power in Humans ) W Additional Materials Reading 80 F Search O a T W ENG 7 01 PM A Mostly cloudy US 2 9 2023 5

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