Problem 9.11 MasteringPhysics 13 of 22 Problem 9.11 As part of a safety investig

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Problem 9.11 MasteringPhysics 13 of 22 Problem 9.11 As part of a safety investigation, two 1700kg cars traveling at 19m/s are crashed into different barriers. Part A Find the average force exerted on the car that hits a line of water barrels and takes 1.8s to stop. Express your answer to two significant figures and include the appropriate units. F1 = SubmitGive Up Part B Find the average force exerted on the car that hits a concrete barrier and takes 0.20s to stop. Express your answer to two significant figures and include the appropriate units. F2 = SubmitGive Up Continue
Problem 9.11 MasteringPhysics 13 of 22 Problem 9.11 As part of a safety investigation, two 1700kg cars traveling at 19m/s are crashed into different barriers. Part A Find the average force exerted on the car that hits a line of water barrels and takes 1.8s to stop. Express your answer to two significant figures and include the appropriate units. F1 = SubmitGive Up Part B Find the average force exerted on the car that hits a concrete barrier and takes 0.20s to stop. Express your answer to two significant figures and include the appropriate units. F2 = SubmitGive Up Continue
Problem 9.11 MasteringPhysics 13 of 22 Problem 9.11 As part of a safety investigation, two 1700kg cars traveling at 19m/s are crashed into different barriers. Part A Find the average force exerted on the car that hits a line of water barrels and takes 1.8s to stop. Express your answer to two significant figures and include the appropriate units. F1 = SubmitGive Up Part B Find the average force exerted on the car that hits a concrete barrier and takes 0.20s to stop. Express your answer to two significant figures and include the appropriate units. F2 = SubmitGive Up Continue Problem 9.11 MasteringPhysics Problem 9.11 MasteringPhysics Problem 9.11 MasteringPhysics Problem 9.11 MasteringPhysics 13 of 22 Problem 9.11 As part of a safety investigation, two 1700kg cars traveling at 19m/s are crashed into different barriers. Part A Find the average force exerted on the car that hits a line of water barrels and takes 1.8s to stop. Express your answer to two significant figures and include the appropriate units. F1 = SubmitGive Up Part B Find the average force exerted on the car that hits a concrete barrier and takes 0.20s to stop. Express your answer to two significant figures and include the appropriate units. F2 = SubmitGive Up Continue Problem 9.11 As part of a safety investigation, two 1700kg cars traveling at 19m/s are crashed into different barriers. Part A Find the average force exerted on the car that hits a line of water barrels and takes 1.8s to stop. Express your answer to two significant figures and include the appropriate units. F1 = SubmitGive Up Part B Find the average force exerted on the car that hits a concrete barrier and takes 0.20s to stop. Express your answer to two significant figures and include the appropriate units. F2 = SubmitGive Up Continue Problem 9.11 As part of a safety investigation, two 1700kg cars traveling at 19m/s are crashed into different barriers. Part A Find the average force exerted on the car that hits a line of water barrels and takes 1.8s to stop. Express your answer to two significant figures and include the appropriate units. F1 = SubmitGive Up Part B Find the average force exerted on the car that hits a concrete barrier and takes 0.20s to stop. Express your answer to two significant figures and include the appropriate units. F2 = SubmitGive Up Problem 9.11 As part of a safety investigation, two 1700kg cars traveling at 19m/s are crashed into different barriers. Part A Find the average force exerted on the car that hits a line of water barrels and takes 1.8s to stop. Express your answer to two significant figures and include the appropriate units. F1 = SubmitGive Up Part B Find the average force exerted on the car that hits a concrete barrier and takes 0.20s to stop. Express your answer to two significant figures and include the appropriate units. F2 = SubmitGive Up Problem 9.11 Problem 9.11 As part of a safety investigation, two 1700kg cars traveling at 19m/s are crashed into different barriers. As part of a safety investigation, two 1700kg cars traveling at 19m/s are crashed into different barriers. As part of a safety investigation, two 1700kg cars traveling at 19m/s are crashed into different barriers. Part A Find the average force exerted on the car that hits a line of water barrels and takes 1.8s to stop. Express your answer to two significant figures and include the appropriate units. F1 = SubmitGive Up Part B Find the average force exerted on the car that hits a concrete barrier and takes 0.20s to stop. Express your answer to two significant figures and include the appropriate units. F2 = SubmitGive Up Part A Find the average force exerted on the car that hits a line of water barrels and takes 1.8s to stop. Express your answer to two significant figures and include the appropriate units. F1 = SubmitGive Up Part A Find the average force exerted on the car that hits a line of water barrels and takes 1.8s to stop. Express your answer to two significant figures and include the appropriate units. F1 = SubmitGive Up F1 = F1 = SubmitGive Up Part B Find the average force exerted on the car that hits a concrete barrier and takes 0.20s to stop. Express your answer to two significant figures and include the appropriate units. F2 = SubmitGive Up Part B Find the average force exerted on the car that hits a concrete barrier and takes 0.20s to stop. Express your answer to two significant figures and include the appropriate units. F2 = SubmitGive Up F2 = F2 = SubmitGive Up Continue F1 =

Explanation / Answer

v = u + at

19 * 1000/3600 = - at

a = - 2.93 m/s^2 (negative sign means deceleration)

average force = ma = 4981 J = 4.9 kJ

2)

similarly a = - 26.4 m/s^2

average force = ma = 44861 J = 45 kJ

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