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Question 1:

According to Newton's third law of motion, for every action, there is an equal and opposite:

A) Reaction
B) Force
C) Acceleration
D) Mass

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Explanation: The correct answer is A) Reaction. According to Newton's third law of motion, for every action (force) exerted on an object, there is an equal and opposite reaction (force) exerted by the object. This means that the forces always occur in pairs and are equal in magnitude but opposite in direction.

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Question 2:

Which of the following statements best describes Newton's third law of motion?

A) The acceleration of an object is directly proportional to the net force applied to it
B) The force acting on an object is equal to its mass times acceleration
C) Forces always occur in pairs with equal magnitude and opposite direction
D) 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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Explanation: The correct answer is C) Forces always occur in pairs with equal magnitude and opposite direction. Newton's third law of motion states that whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object. This law highlights the balanced nature of forces and their occurrence in pairs.

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Question 3:

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

A) A person pushing a heavy box and the box moving in the opposite direction
B) A car accelerating on a straight road
C) A ball rolling down a hill
D) A rocket taking off

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Explanation: The correct answer is A) A person pushing a heavy box and the box moving in the opposite direction. An example of Newton's third law of motion is a person pushing a heavy box. When the person exerts a force on the box, the box exerts an equal and opposite force on the person, causing the box to move in the opposite direction.

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Question 4:

Which of the following statements is true according to Newton's third law of motion?

A) The forces between two objects are always equal in magnitude but opposite in direction
B) The force exerted by a heavier object is greater than the force exerted by a lighter object
C) The force exerted by an object is always greater than the force it experiences in return
D) The forces between two objects depend on their relative speeds

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Explanation: The correct answer is A) The forces between two objects are always equal in magnitude but opposite in direction. According to Newton's third law of motion, the forces exerted by two objects on each other are always equal in magnitude but opposite in direction. This law emphasizes the balanced nature of forces, with the action and reaction forces being of the same magnitude but acting in opposite directions.

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Question 5:

Which of the following is an example of Newton's third law of motion in everyday life?

A) Inflating a balloon and feeling it push back against your hand
B) Sliding down a playground slide
C) Riding a bicycle uphill
D) Opening a door by turning the doorknob

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Explanation: The correct answer is A) Inflating a balloon and feeling it push back against your hand. When you inflate a balloon, the air pressure inside the balloon increases. As a result, the balloon exerts a force in one direction, pushing the air out of the balloon. Simultaneously, the air exerts an equal and opposite force on the balloon, pushing it back against your hand. This is an example of Newton's third law of motion, where the action of the air pushing outwards is met with an equal and opposite reaction of the balloon pushing inwards.