Physics Question

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter11: Collisions
Section11.3: Conservation During A Collision
Problem 11.4CE
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Two trucks travel at constant velocities until they collide. The truck on the right has a mass of 1000
kg and a speed of 3 m/s, and the moving van on the left has a mass of 8000 kg and a speed of 4
m/s. Three physics students are discussing the moment the trucks collide, and each make a claim
about the forces on each truck.
Student 1 I think that the truck will get hit harder than the moving van. Since the
moving van has a bigger mass, the truck will also have a higher
acceleration.
Student 2 The moving van will feel a greater force than the smaller truck. Since the
moving van was moving faster originally, it will have a higher acceleration.
Student 3 Both the truck and the moving van will be hit with the same force. Since
the truck has a smaller mass, it will experience a larger acceleration.
Which of the following identifies a mistake in one of the students' claims and explains why it is
incorrect?
Transcribed Image Text:Two trucks travel at constant velocities until they collide. The truck on the right has a mass of 1000 kg and a speed of 3 m/s, and the moving van on the left has a mass of 8000 kg and a speed of 4 m/s. Three physics students are discussing the moment the trucks collide, and each make a claim about the forces on each truck. Student 1 I think that the truck will get hit harder than the moving van. Since the moving van has a bigger mass, the truck will also have a higher acceleration. Student 2 The moving van will feel a greater force than the smaller truck. Since the moving van was moving faster originally, it will have a higher acceleration. Student 3 Both the truck and the moving van will be hit with the same force. Since the truck has a smaller mass, it will experience a larger acceleration. Which of the following identifies a mistake in one of the students' claims and explains why it is incorrect?
Which of the following identifies a mistake in one of the students’ claims and explains why it is
incorrect?
1) Student 1 is incorrect because a larger mass will always have a smaller acceleration.
2) Student 2 is incorrect because both trucks will experience the same amount of force
3) Student 3 is incorrect because Newton's third law tells us that both trucks must experience
equal force and equal acceleration
4) All of the students are incorrect because collisions have to do with momentum, not forces
or acceleration
Transcribed Image Text:Which of the following identifies a mistake in one of the students’ claims and explains why it is incorrect? 1) Student 1 is incorrect because a larger mass will always have a smaller acceleration. 2) Student 2 is incorrect because both trucks will experience the same amount of force 3) Student 3 is incorrect because Newton's third law tells us that both trucks must experience equal force and equal acceleration 4) All of the students are incorrect because collisions have to do with momentum, not forces or acceleration
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