Newton's 1st Law of Motion

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What is Newton's 1st Law of Motion?

Back

Newton's 1st Law of Motion states that an object at rest will remain at rest, and an object in motion will remain in motion at a constant velocity unless acted upon by an unbalanced force.

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What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. It is directly related to the mass of the object.

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What happens to an object when the forces acting on it are balanced?

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When the forces acting on an object are balanced, the object will not change its motion; it will either remain at rest or continue moving at a constant speed in a straight line.

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What is an unbalanced force?

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An unbalanced force is a force that causes an object to accelerate, change direction, or change its state of motion.

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Give an example of Newton's 1st Law of Motion in everyday life.

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A skateboarder rolling down a hill will continue to roll until a force, like friction or a wall, stops them.

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What will happen to a moving object if no unbalanced force acts on it?

Back

A moving object will continue to move in a straight line at a constant speed.

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What is the relationship between mass and inertia?

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The greater the mass of an object, the greater its inertia, meaning it will require more force to change its motion.

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What is the effect of inertia when a car suddenly stops?

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When a car suddenly stops, the inertia of the passengers causes them to lurch forward.

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What is the Law of Inertia?

Back

The Law of Inertia is another name for Newton's 1st Law of Motion, emphasizing that objects resist changes to their motion.

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How does friction affect motion according to Newton's 1st Law?

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Friction is a force that opposes motion, and it can cause a moving object to eventually stop.