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Arizona State University *

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252

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Physics

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Dec 6, 2023

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7

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11/2/23, 10:31 PM ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false https://ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false 1/7 What is a Force? Quiz Student: Canakapalli, Nityasiri Course: Physics A Honors (FA23) AZ 1 - 2023-2024 Questions 1. [Always] When there is a net force acting upon an object, there will be a change in the speed and/or direction of that object. N N N N / 1 0 Points
11/2/23, 10:31 PM ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false https://ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false 2/7 2. At any given moment there are several different forces acting on an object. Which of the following observations indicate that the forces are NOT in equilibrium? (Choose all that apply) Correct Correct Correct [Always] When forces are not in equilibrium, the object will accelerate in the direction of the net force. The object is standing still. The object is speeding up. The object is changing direction. The object has a constant velocity. The object is slowing down. / 1 1 Points 3. As part of a contest, two people are each pulling a -kg car towards themselves. One person applies a -N force to the right, while the other person applies a -N force towards the left. What is the net force on the car? Correct [Always] When forces are along the same axis (e.g. the left-right axis), they can be added and subtracted like scalar values, but make sure that you have the correct sign on each value. N to the left N to the right N to the left N to the right / 1 1 Points
11/2/23, 10:31 PM ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false https://ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false 3/7 4. A woman is standing on a raft. Paddling, she causes an average force of N to be applied to the raft directly east. The wind also exerts a force on the raft. This force has a magnitude of N and points directly north. Ignoring any resistance from the water, find the net force on the raft. Correct [Always] Force is a vector, and you can find the net force by finding the sum of the force vectors acting on an object. N at ° N of E at ° S of E N at ° N of E at ° N of W / 1 1 Points 5. Two people are pushing a -kilogram car. One person applies a force of N to the car, while the other person applies N, in the same direction. A third force N (friction) acts opposite these forces. What is the net force on the car? Correct [Always] When forces are along the same axis (e.g. the east-west axis), they can be added and subtracted like scalar values, but make sure that you have the correct sign on each value. N N N N / 1 1 Points
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11/2/23, 10:31 PM ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false https://ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false 4/7 6. Which of the following statements best describes what a force is? Correct [Always] A net external force will cause a change in speed and/or direction. A change in position over time. A push or pull that causes an object to accelerate. A change in velocity. Motion that occurs simultaneously in both the horizontal and vertical directions. / 1 1 Points 7. Reggie is pulling his little sister and dog across the snow on a sled. Which of the following forces should be drawn in the free body diagram of this situation? (Choose all that apply) Correct Correct Correct Correct [Always] When creating a free body diagram, only external (outside) forces should be drawn. For example, if you are drawing the free body for a car, you wouldn’t draw in the passenger pushing on the dashboard. the friction that slows the sled down the pulling force Reggie exerts on the sled the force the sister exerts on the dog the force the dog exerts on the sister the downward force of gravity on the sled the ground pushing upward on the sled / 1 1 Points
11/2/23, 10:31 PM ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false https://ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false 5/7 8. Examine the free body diagram shown above. What is the magnitude of the net force on this object? Correct N N N N / 1 1 Points
11/2/23, 10:31 PM ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false https://ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false 6/7 9. A crate on a construction site has a two forces acting on it. The downward pull of gravity exerts a force of N, while a crane exerts an upward force of N. What is the net force on the crate? Correct [Always] When forces are along the same axis (e.g. the vertical axis), they can be added and subtracted like scalar values, but make sure that you have the correct sign on each value. N upward N downward N upward N downward / 1 1 Points 10. Which of the following are examples of field forces? (Choose all that apply) Correct Correct Correct [Always] Field forces are able to exert a force without touching the object they are exerted upon. static electricity magnetic forces pulling friction Pushing gravitational force / 1 1 Points
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11/2/23, 10:31 PM ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false https://ssi.agilixbuzz.com/student/200011839/gradebook/grade-details/021bd740b84f43f18f5f90f1d5558554?hideItemLink=false 7/7

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