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17. A 10.0-kg rocket is fired vertically from Cape Canaveral. Its fuel gives it a kinetic energy of 1960 J by the time the rocket motor burns out of fuel. What additional height will the rocket rise?

17. A 10.0-kg rocket is fired vertically from Cape Canaveral. Its fuel gives it a kinetic energy of 1960 J by the time the rocket motor burns out of fuel. What additional height will the rocket rise?

College Physics
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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9. Sally has a mass if 45-kg and is moving with a speed of 10.0 m/s. a. Find Sally's kinetic energy. KE = (45) (l0)? (2250.3) V= 18. Sally's speed changes to 5.0 m/s. Now what is her kinetic enerey542.5J) m=#5K9" Vc.5 HöW much work was done to change her speed? KE =5nv KE=5 (45)(5)? Z250.- 562.5= 687.5) 10. Shawn and his bike have a total mass of 45.0-kg. Shawn rides 1800 m in 600 seconds at a constant velocity. What is Shawn's kinetic energy? 1800=606 -3 KE =Ś (45)(3)? (2o253) KE = 11. Matt and Will each have a mass of 60-kg and they are moving together with a velocity of 10.0 m/s. What is their combined kinețic energy? n=6o K9 V=10.om/s 12. A 2000-kg car has a velocity of 12.0 m/s. The car then hits a tree. The tree doesn't move and the car comes to rest. a. Find the change in kinetic energy of the car. n= 7000 K V= 17.6 nls b. Find the amount of work done in pushing in the front of the car. KE = (60) Clo)? (3000) KE-mu KE = mv KE = (7000) (12.0)²-(4320 J c. Find the size of the force that pushed in the front of the car in 0.50 m. 13. How much potential energy does Tim, mass 60.0-kg, gain when he climbs a gymnasium rope a distance 60 of 3.5 m? GPE=ngh GPE = (60) (9.8)(3.5)= 9: 9.8 2058.J 14. A 6.4-kg bowling ball is lifted 2.1 m into a storage rack. Calculate the increase in the ball's potential energy. m=6.4K9 9=9.8 15. Mary weighs 500-N and walks down a flight of stairs to a level 5.50 m below her starting point, What is the change in Mary's potential energy? F= S00 N d- 5.5am 16. Å weightlifter raises a 180-kg barbell to a height of 1.95 m. What is the increase in the barbell’s potential energy? m=180 K9 GPE = mgh GPE = (6.4) (9.8) (2-1) =131.717 %3D wi (500) (5.50)=2750J g-9.8 he1.98 GPE = mgh OPE = (180)(9.8) (1-98) = 3492. 72 17. A 10.0-kg rocket is fired vertically from Cape Canaveral. Its fuel gives it a kinetic energy of 1960 J by the time the rocket motor burns out of fuel. What additional height will the rocket rise? 18. A hallway of energy is constructed. People are told that to do 1.00 J of work, they should pull on a rope that lifts a block 1.00 m. What should be the mass of the block? 1) 27 = 3V
Transcribed Image Text:9. Sally has a mass if 45-kg and is moving with a speed of 10.0 m/s. a. Find Sally's kinetic energy. KE = (45) (l0)? (2250.3) V= 18. Sally's speed changes to 5.0 m/s. Now what is her kinetic enerey542.5J) m=#5K9" Vc.5 HöW much work was done to change her speed? KE =5nv KE=5 (45)(5)? Z250.- 562.5= 687.5) 10. Shawn and his bike have a total mass of 45.0-kg. Shawn rides 1800 m in 600 seconds at a constant velocity. What is Shawn's kinetic energy? 1800=606 -3 KE =Ś (45)(3)? (2o253) KE = 11. Matt and Will each have a mass of 60-kg and they are moving together with a velocity of 10.0 m/s. What is their combined kinețic energy? n=6o K9 V=10.om/s 12. A 2000-kg car has a velocity of 12.0 m/s. The car then hits a tree. The tree doesn't move and the car comes to rest. a. Find the change in kinetic energy of the car. n= 7000 K V= 17.6 nls b. Find the amount of work done in pushing in the front of the car. KE = (60) Clo)? (3000) KE-mu KE = mv KE = (7000) (12.0)²-(4320 J c. Find the size of the force that pushed in the front of the car in 0.50 m. 13. How much potential energy does Tim, mass 60.0-kg, gain when he climbs a gymnasium rope a distance 60 of 3.5 m? GPE=ngh GPE = (60) (9.8)(3.5)= 9: 9.8 2058.J 14. A 6.4-kg bowling ball is lifted 2.1 m into a storage rack. Calculate the increase in the ball's potential energy. m=6.4K9 9=9.8 15. Mary weighs 500-N and walks down a flight of stairs to a level 5.50 m below her starting point, What is the change in Mary's potential energy? F= S00 N d- 5.5am 16. Å weightlifter raises a 180-kg barbell to a height of 1.95 m. What is the increase in the barbell’s potential energy? m=180 K9 GPE = mgh GPE = (6.4) (9.8) (2-1) =131.717 %3D wi (500) (5.50)=2750J g-9.8 he1.98 GPE = mgh OPE = (180)(9.8) (1-98) = 3492. 72 17. A 10.0-kg rocket is fired vertically from Cape Canaveral. Its fuel gives it a kinetic energy of 1960 J by the time the rocket motor burns out of fuel. What additional height will the rocket rise? 18. A hallway of energy is constructed. People are told that to do 1.00 J of work, they should pull on a rope that lifts a block 1.00 m. What should be the mass of the block? 1) 27 = 3V
KE = mu? GPE = mgh Period: レ=fd Wnst=DKE Energy Directions: Read each of the following statements/questions. Answer them correctly and box your finai answer. 1. A shot-putter heaves a 7.26-kg shot with a final velocity of 7.50 m/s. a. What is the kinetic energy if the shot? m= 7.26 K9 V= 7.50 m/5 KE -nut b. The shot was initially at rest. How much work was done on it to give it this kinetic energy? レ 2. What is the kinetic energy of a 750-kg compact car traveling at 27.0 m/s? mu? KE =4)(750) (27)2 3. A 2.00-kg textbook is lifted from the floor to a shelf 2.10 m above the floor. mo 750 K9 V= 27.0 mlş KE=Z 273375.J a. What is the gravitational potential energy relative to the floor? m= 2.00 K9 GPEEmgh gravitational potential energy relative to the head of a 1.65 m tall person? 7.1c - |. 65=-75 GPE= (700) ( 9.g) () =H1.2 b. What is the GPE = (7.0)(18)(.45)=8.8J) A 90-kg rock climber first climb 45 m upward to 85 m to the bottom. Find the potential energy of the climber at the edge and at the bottom, using the initial height as the reference level. top edge of a quarry, then, from the top, descends 5. A 50.0-kg shell is shot from m= S00 a. What is the gravitational potential energy with respect to Earth's surface of the Earth-shell cannon at Earth's surface to a height of 400 m. system when the shell is at this height? GPE -mgh 196600-J) GPE= (50.0) (9.8) (400) = b. What is the change in potential energy of the system when the shell falls to a height of 200 m? GPE= (50.0) (9.8)0 98660.J) 6. A person weighing 630-N climbs up a ladder to a height of 5.0m. a. What work does the person do? [-630N 5.omboFd wil630) (5.0) 3150.3 こ b. What is the increase in the gravitational potential energy of the person from the ground to this height? GPE Fd Same thing 7. A 1600-kg car travels at a speed of 12.5 m/s. What is its kinetic energy? m=1600 KJ Vー7.5 m/s. 8. A racing car has a mass of 1500-kg. What is its kinetic energy if it has a speed of 30.0 m/s? KE- 2mu? KE = 7C1600) C17:5)? 1800.J mこ156 Kg V= 30,0m/s KE -mu? KE = (1500)( 30.0)2 675000.5 11) 27 = 3Va 15) 212 = -4 + r
Transcribed Image Text:KE = mu? GPE = mgh Period: レ=fd Wnst=DKE Energy Directions: Read each of the following statements/questions. Answer them correctly and box your finai answer. 1. A shot-putter heaves a 7.26-kg shot with a final velocity of 7.50 m/s. a. What is the kinetic energy if the shot? m= 7.26 K9 V= 7.50 m/5 KE -nut b. The shot was initially at rest. How much work was done on it to give it this kinetic energy? レ 2. What is the kinetic energy of a 750-kg compact car traveling at 27.0 m/s? mu? KE =4)(750) (27)2 3. A 2.00-kg textbook is lifted from the floor to a shelf 2.10 m above the floor. mo 750 K9 V= 27.0 mlş KE=Z 273375.J a. What is the gravitational potential energy relative to the floor? m= 2.00 K9 GPEEmgh gravitational potential energy relative to the head of a 1.65 m tall person? 7.1c - |. 65=-75 GPE= (700) ( 9.g) () =H1.2 b. What is the GPE = (7.0)(18)(.45)=8.8J) A 90-kg rock climber first climb 45 m upward to 85 m to the bottom. Find the potential energy of the climber at the edge and at the bottom, using the initial height as the reference level. top edge of a quarry, then, from the top, descends 5. A 50.0-kg shell is shot from m= S00 a. What is the gravitational potential energy with respect to Earth's surface of the Earth-shell cannon at Earth's surface to a height of 400 m. system when the shell is at this height? GPE -mgh 196600-J) GPE= (50.0) (9.8) (400) = b. What is the change in potential energy of the system when the shell falls to a height of 200 m? GPE= (50.0) (9.8)0 98660.J) 6. A person weighing 630-N climbs up a ladder to a height of 5.0m. a. What work does the person do? [-630N 5.omboFd wil630) (5.0) 3150.3 こ b. What is the increase in the gravitational potential energy of the person from the ground to this height? GPE Fd Same thing 7. A 1600-kg car travels at a speed of 12.5 m/s. What is its kinetic energy? m=1600 KJ Vー7.5 m/s. 8. A racing car has a mass of 1500-kg. What is its kinetic energy if it has a speed of 30.0 m/s? KE- 2mu? KE = 7C1600) C17:5)? 1800.J mこ156 Kg V= 30,0m/s KE -mu? KE = (1500)( 30.0)2 675000.5 11) 27 = 3Va 15) 212 = -4 + r
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