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1. The figures below show the same block in three different states of motion. Which of the following must be the reason why the block does not move in Figure A? A. The block is too heavy to move. B. There is too much friction between the floor and the block. C. There are no forces acting on the block, either vertically or horizontaly. D. There are forces acting on the block in the vertical component but not in horizontal component and these ferces are equal in magnitude Satc Force Krete Fuor appled Applec hicton 7. A 5-kg suitcase is hanging straight down from your hand as you ride a 6-m escalator. Your hand exerts force on the suitcase and this force does work. Which of the following statements is true? A. The work done on the plastic bag as you ride up is equal to the work done as you ride down. B. The work done on the plastic bag as you ride up is lesser than the work done as you ride down. C. The work done on the plastic bag as you ride up is greater than the work done as you ride down. D. None of these. 8. A waiter lifts a tray of spaghetti and drinks with a total mass of 2 kg from the table. He then delivers the tray to the customer on the other side of the restaurant and then places it on the table. If the waiter walks across the room with a constant speed, how much work does he do on the tray while walking? C. More than zero joules A. Zero Joules D. None of these B. Less than zero joules

1. The figures below show the same block in three different states of motion. Which of the following must be the reason why the block does not move in Figure A? A. The block is too heavy to move. B. There is too much friction between the floor and the block. C. There are no forces acting on the block, either vertically or horizontaly. D. There are forces acting on the block in the vertical component but not in horizontal component and these ferces are equal in magnitude Satc Force Krete Fuor appled Applec hicton 7. A 5-kg suitcase is hanging straight down from your hand as you ride a 6-m escalator. Your hand exerts force on the suitcase and this force does work. Which of the following statements is true? A. The work done on the plastic bag as you ride up is equal to the work done as you ride down. B. The work done on the plastic bag as you ride up is lesser than the work done as you ride down. C. The work done on the plastic bag as you ride up is greater than the work done as you ride down. D. None of these. 8. A waiter lifts a tray of spaghetti and drinks with a total mass of 2 kg from the table. He then delivers the tray to the customer on the other side of the restaurant and then places it on the table. If the waiter walks across the room with a constant speed, how much work does he do on the tray while walking? C. More than zero joules A. Zero Joules D. None of these B. Less than zero joules

Glencoe Physics: Principles and Problems, Student Edition
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter5: Displacement And Force In Two Dimensions
Section: Chapter Questions
Problem 104A
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1. The figures below show the same block in three different states of motion. Which of the following must be the reason why the block does not move in Figure A? A. The block is too heavy to move. B. There is too much friction between the floor and the block. C. There are no forces acting on the block, either vertically or horizontally. D. There are forces acting on the block in the vertical component but not in horizontal component and these ferces are equal in magnitude. Fuor Slatc Force appled 7. A 5-kg suitcase is hanging straight down from your hand as you ride a 6-m escalator. Your hand exerts force on the suitcase and this force does work. Which of the following statements is true? A. The work done on the plastic bag as you ride up is equal to the work done as you ride down. B. The work done on the plastic bag as you ride up is lesser than the work done as you ride down. C. The work done on the plastic bag as you ride up is greater than the work done as you ride down. D. None of these. 8. A waiter lifts a tray of spaghetti and drinks with a total mass of 2 kg from the table. He then delivers the tray to the customer on the other side of the restaurant and then places it on the table. If the waiter walks across the room with a constant speed, how much work does he do on the tray while walking? C. More than zero joules A. Zero Joules D. None of these B. Less than zero joules
Transcribed Image Text:1. The figures below show the same block in three different states of motion. Which of the following must be the reason why the block does not move in Figure A? A. The block is too heavy to move. B. There is too much friction between the floor and the block. C. There are no forces acting on the block, either vertically or horizontally. D. There are forces acting on the block in the vertical component but not in horizontal component and these ferces are equal in magnitude. Fuor Slatc Force appled 7. A 5-kg suitcase is hanging straight down from your hand as you ride a 6-m escalator. Your hand exerts force on the suitcase and this force does work. Which of the following statements is true? A. The work done on the plastic bag as you ride up is equal to the work done as you ride down. B. The work done on the plastic bag as you ride up is lesser than the work done as you ride down. C. The work done on the plastic bag as you ride up is greater than the work done as you ride down. D. None of these. 8. A waiter lifts a tray of spaghetti and drinks with a total mass of 2 kg from the table. He then delivers the tray to the customer on the other side of the restaurant and then places it on the table. If the waiter walks across the room with a constant speed, how much work does he do on the tray while walking? C. More than zero joules A. Zero Joules D. None of these B. Less than zero joules
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