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Question 1:

Newton's first law of motion is also known as:

A) Law of Action and Reaction
B) Law of Inertia
C) Law of Acceleration
D) Law of Gravitation

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Explanation: The correct answer is B) Law of Inertia. Newton's first law of motion is commonly known as the Law of Inertia. It states that an object at rest will stay at rest, and an object in motion will continue moving with a constant velocity unless acted upon by an external force.

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Question 2:

According to Newton's first law of motion, an object will maintain its state of motion unless:

A) A net force is applied to it
B) It is on a frictionless surface
C) It is in a vacuum
D) It is in outer space

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Explanation: The correct answer is A) A net force is applied to it. According to Newton's first law of motion, an object will maintain its state of motion (either at rest or moving with a constant velocity) unless acted upon by an external force. In the absence of a net force, an object will continue its motion unchanged.

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Question 3:

Which of the following is an example of Newton's first law of motion?

A) A ball rolling down a hill
B) A rocket taking off
C) A book sliding on a table and coming to a stop
D) A car accelerating from rest

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Explanation: The correct answer is C) A book sliding on a table and coming to a stop. An example of Newton's first law of motion is a book sliding on a table and eventually coming to a stop. In the absence of any external forces (such as friction or air resistance), the book would continue its motion with a constant velocity, but frictional forces eventually bring it to rest.

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Question 4:

According to Newton's first law of motion, an object with a greater mass will have:

A) Greater inertia
B) Greater acceleration
C) Greater velocity
D) Greater gravitational force

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Explanation: The correct answer is A) Greater inertia. According to Newton's first law of motion, an object with a greater mass will have greater inertia. Inertia is the resistance of an object to changes in its state of motion, and it depends on the object's mass. Greater mass means greater inertia, making it harder to change the object's state of motion.

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Question 5:

Which of the following best describes inertia?

A) The tendency of an object to move with constant velocity
B) The tendency of an object to resist changes in its state of motion
C) The force required to keep an object in motion
D) The energy possessed by an object in motion

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Explanation: The correct answer is B) The tendency of an object to resist changes in its state of motion. Inertia is the property of an object that describes its tendency to resist changes in its state of motion. It is a fundamental concept in Newton's first law of motion, highlighting that objects will maintain their current state of motion (either at rest or in motion with a constant velocity) unless acted upon by an external force.