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Newton'S 3Rd Law And Free Body Diagrams Quiz
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Multiple Choice Questions
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Given that two objects interact via some force, the accelerations of these two objects have the same magnitude but opposite directions. (Assume no other forces act on either object.)
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True
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False
A large truck collides head-on with a small car. The car is severely damaged as a result of the collision. According to Newton's third law, how do the forces acting between the truck and car compare during the collision?
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the object pulling upward on Earth
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The magnitude of the tension in the string is less than the magnitude of the weight of the object.
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The force on the truck is equal to the force on the car.
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The magnitude of the tension in the string is equal to the magnitude of the weight of the object.
Every force has one and only one 3rd law pair force.
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True
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False
According to Newton's 3rd law, the force on the (smaller) moon due to the (larger) earth is
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equal in magnitude to, and in the opposite direction from, the force on the earth due to the moon.
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The magnitude of the tension in the string is equal to the magnitude of the weight of the object.
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The force on the truck is equal to the force on the car.
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The magnitude of the tension in the string is less than the magnitude of the weight of the object.
An object is hanging by a string from the ceiling of an elevator. The elevator is slowing down while moving upward. What is the magnitude of the tension in the string?
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The force on the truck is equal to the force on the car.
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The magnitude of the tension in the string is equal to the magnitude of the weight of the object.
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The magnitude of the tension in the string is less than the magnitude of the weight of the object.
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the object pulling upward on Earth
The two forces in each pair act in opposite directions.
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True
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False
The two forces in each pair can act on the same object or on different objects.
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True
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False
The two forces of a 3rd law pair always act on different objects.
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True
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False
The two forces in each pair may have different physical origins (for instance, one of the forces could be due to gravity, and its pair force could be a normal contact force).
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True
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False
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Multiple Choice Questions
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