Newton's Laws Test Review

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What is inertia?

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Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.

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What does Newton's 1st Law state?

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Newton's 1st Law states that an object at rest will remain at rest, and an object in motion will continue in motion with the same speed and in the same direction unless acted upon by a net external force.

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What does Newton's 2nd Law state?

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Newton's 2nd Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This is often expressed as F=ma (Force = mass x acceleration).

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What does Newton's 3rd Law state?

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Newton's 3rd Law states that for every action, there is an equal and opposite reaction.

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What is a resultant force?

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The resultant force is the overall force acting on an object when all individual forces are combined. It determines the object's motion.

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How do you calculate resultant force?

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To calculate resultant force, add all the forces acting in one direction and subtract the forces acting in the opposite direction.

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What is an example of inertia in everyday life?

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An example of inertia is when a car suddenly stops, and passengers lurch forward due to their inertia.

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What is the significance of friction in motion?

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Friction is a force that opposes the motion of an object. It is essential for activities like walking, driving, and holding objects.

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How does mass affect acceleration according to Newton's 2nd Law?

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According to Newton's 2nd Law, as mass increases, acceleration decreases if the same force is applied. This means heavier objects require more force to accelerate.

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What is an example of Newton's 3rd Law?

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An example of Newton's 3rd Law is when you push against a wall; the wall pushes back with an equal force.