Number 12 KE=4 mužGPE = mghPertoレ=fdWnat-DKE EnergyDirections: Read each of the following statements/questions. Answer them correctly1A 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 K9V= 7.50 m/sKE -nuKE .26X7.50)= |204.2Jb. The shot was initially at rest. How much work was done on it to give it this kinetic energy?W=KEF wZ64.2J)2. What is the kinetic energy of a 750-kg compact car traveling at 27.0 m/s?me 750 kgV= 27.0 mls3. A 2.00-kg textbook is lifted from the floor to a shelf 2.10 m above the floor.a. What is the gravitational potential energy relative to the floor?KE =4.? KE 4)(750) (27)2273375, Jm= 2.00SPE=rgh aPE : (7.6) ( 9.8) (2-10) - t1.2b. What is the gravitational potential energy relative to the head of a 1.65 m tall person? 7.16-1.65:-75GPE = (7-0)(98) (.45)=8.8J)A 90-kg rock climber first climb 45 m upward to the top edge of a quarry, then, from the top, descends85 m to the bottom. Find the potential energy of the climber at the edge and at the bottom, using theinitial height as the reference level.5. A 50.0-kg shell is shot from a cannon at Earth's surface to a height of 400 m.What is the gravitational potential energy with respect to Earth's surface of the Earth-shellsystem when the shell is at this height?GPE = mghm= Se0 a.GPE= (50.0) ( 9.8) (400) =196660-J9-9.8h=400b. 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) (Zoo) =6. A person weighing 630-N climbs up a ladder to a height of 5.0m.198600.J)a. What work does the person do?f=630MFd w=(630) (5.0) = 3150.Jd= 5.om wrb. What is the increase in the gravitational potential energy of the person from the ground to thisheight?GPE = FdSame thing7. A 1600-kg car travels at a speed of 12.5 m/s. What is its kinetic energy?m=1600 KJV= 17.5 m/sKE = ZC 1600) C12.5)?1800.J8. A racing car has a mass of 1500-kg. What is its kinetic energy if it has a speed of 30.0 m/s?m=1500 KgV- 30,0mls KEmoe KE= (1500)( 30 0)2V= 3o,0m/s675000.511) 27 = 315) 212 = 4+, 13)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.(45)(l0)(2250.5)KE = + mvzKEV= 1B. Sally's speed changes to 5.0 m/s. Now what is her kinetic energy?m=45K9"KE =5nvV C. HOW much work was done to change her speed?562.5J)KE=5 (45)(5)?2250:10. Shawn and his bike have a total mass of 45.0-kg, Shawn rides 1800 m in 600 seconds at a constantvelocity. What is Shawn's kinetic energy?1800-606 -3KE =Ś (45)(3)" (20253)KE = mvz1111. 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 K9V=10.om/s12. 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 carKE-KE = ( 60) Clo)3000.)comes to rest.a. Find the change in kinetic energy of the car.n- 7000 K)V= 17.6 nl5b. Find the amount of work done in pushing in the front of the car.KE= mv? KE= (7000) (12:0)-(4320Jc.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 distance66 of 3.5 m?GPE=nghGPE = (60) ( 9.)3.5)=9= 9.82058.314. A 6.4-kg bowling ball is lifted 2.1 m into a storage rack. Calculate the increase in the ball's potentialenergy.m= 6.4 K99=9.815. Mary weighs 500-N and walks down a flight of stairs to a level 5.50 m below her starting point, What isthe change in Mary's potential energy?E= 500 Nd- 5.5am16. Å weightlifter raises a 180-kg barbell to a height of 1.95 m. What is the increase in the barbell'spotential energy? m=180 K9GPE = mghGPE = (6.4) (9.8) (2-1)131.712J(500) (5.50)= 2750Jg-9.8GPE= mgh OPE = C180)(9-8) (1-98) 3492.72J17. A 10.0-kg rocket is fired vertically from Cape Canaveral. Its fuel gives it a kinetic energy of 1960 J bythe 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 ropethat lifts a block 1.00 m. What should be the mass of the block?

Question

Number 12 KE=4 mužGPE = mghPertoレ=fdWnat-DKE EnergyDirections: Read each of the following statements/questions. Answer them correctly1A 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 K9V= 7.50 m/sKE -nuKE .26X7.50)= |204.2Jb. The shot was initially at rest. How much work was done on it to give it this kinetic energy?W=KEF wZ64.2J)2. What is the kinetic energy of a 750-kg compact car traveling at 27.0 m/s?me 750 kgV= 27.0 mls3. A 2.00-kg textbook is lifted from the floor to a shelf 2.10 m above the floor.a. What is the gravitational potential energy relative to the floor?KE =4.? KE 4)(750) (27)2273375, Jm= 2.00SPE=rgh aPE : (7.6) ( 9.8) (2-10) - t1.2b. What is the gravitational potential energy relative to the head of a 1.65 m tall person? 7.16-1.65:-75GPE = (7-0)(98) (.45)=8.8J)A 90-kg rock climber first climb 45 m upward to the top edge of a quarry, then, from the top, descends85 m to the bottom. Find the potential energy of the climber at the edge and at the bottom, using theinitial height as the reference level.5. A 50.0-kg shell is shot from a cannon at Earth's surface to a height of 400 m.What is the gravitational potential energy with respect to Earth's surface of the Earth-shellsystem when the shell is at this height?GPE = mghm= Se0 a.GPE= (50.0) ( 9.8) (400) =196660-J9-9.8h=400b. 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) (Zoo) =6. A person weighing 630-N climbs up a ladder to a height of 5.0m.198600.J)a. What work does the person do?f=630MFd w=(630) (5.0) = 3150.Jd= 5.om wrb. What is the increase in the gravitational potential energy of the person from the ground to thisheight?GPE = FdSame thing7. A 1600-kg car travels at a speed of 12.5 m/s. What is its kinetic energy?m=1600 KJV= 17.5 m/sKE = ZC 1600) C12.5)?1800.J8. A racing car has a mass of 1500-kg. What is its kinetic energy if it has a speed of 30.0 m/s?m=1500 KgV- 30,0mls KEmoe KE= (1500)( 30 0)2V= 3o,0m/s675000.511) 27 = 315) 212 = 4+, 13)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.(45)(l0)(2250.5)KE = + mvzKEV= 1B. Sally's speed changes to 5.0 m/s. Now what is her kinetic energy?m=45K9&#34;KE =5nvV C. HOW much work was done to change her speed?562.5J)KE=5 (45)(5)?2250:10. Shawn and his bike have a total mass of 45.0-kg, Shawn rides 1800 m in 600 seconds at a constantvelocity. What is Shawn's kinetic energy?1800-606 -3KE =Ś (45)(3)&#34; (20253)KE = mvz1111. 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 K9V=10.om/s12. 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 carKE-KE = ( 60) Clo)3000.)comes to rest.a. Find the change in kinetic energy of the car.n- 7000 K)V= 17.6 nl5b. Find the amount of work done in pushing in the front of the car.KE= mv? KE= (7000) (12:0)-(4320Jc.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 distance66 of 3.5 m?GPE=nghGPE = (60) ( 9.)3.5)=9= 9.82058.314. A 6.4-kg bowling ball is lifted 2.1 m into a storage rack. Calculate the increase in the ball's potentialenergy.m= 6.4 K99=9.815. Mary weighs 500-N and walks down a flight of stairs to a level 5.50 m below her starting point, What isthe change in Mary's potential energy?E= 500 Nd- 5.5am16. Å weightlifter raises a 180-kg barbell to a height of 1.95 m. What is the increase in the barbell'spotential energy? m=180 K9GPE = mghGPE = (6.4) (9.8) (2-1)131.712J(500) (5.50)= 2750Jg-9.8GPE= mgh OPE = C180)(9-8) (1-98) 3492.72J17. A 10.0-kg rocket is fired vertically from Cape Canaveral. Its fuel gives it a kinetic energy of 1960 J bythe 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 ropethat lifts a block 1.00 m. What should be the mass of the block?

Accepted Answer

12)Given,
Mass of car(m)= 2000kg
Initial velocity of car (u)= 12 m/s
Final velocity of car (v)= 0m/s…