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What is Newton's First Law of Motion?
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An object at rest stays at rest, and an object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced external force.
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What is the concept of inertia?
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Inertia is the resistance of any physical object to any change in its velocity, including changes to its speed or direction.
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How does Newton's First Law apply to seatbelts in cars?
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Seatbelts help to provide the external force needed to stop your body from continuing in motion when a car stops quickly.
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What is Newton's Second Law of Motion?
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The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
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What is the equation for Newton's Second Law?
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F = ma, where F is the net force acting on an object, m is the mass, and a is the acceleration.
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How does mass affect acceleration according to Newton's Second Law?
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A greater mass results in smaller acceleration if the same force is applied, compared to a smaller mass.
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What is an example of Newton's Second Law in everyday life?
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Pushing a shopping cart - the more force you apply, the faster it accelerates.
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What is Newton's Third Law of Motion?
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For every action, there is an equal and opposite reaction.
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Can you give an example of Newton's Third Law?
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When you jump off a small boat, the boat moves backward as you move forward.
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How do rocket engines demonstrate Newton's Third Law?
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The gases expelled backward from the engine cause the rocket to move forward.
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What is the concept of a force pair in Newton's Third Law?
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Forces always come in pairs, with each force acting on different objects.
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How do Newton's Laws of Motion explain the movement of a car?
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The car accelerates forward (Second Law) when the engine applies force to the wheels, remains in motion (First Law) with constant speed on a highway, and the tires push backward against the ground while the ground pushes the car forward (Third Law).
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What role does friction play in Newton's First Law?
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Friction is often the unbalanced force that changes the state of motion of objects at rest or in motion.
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How can you calculate net force if multiple forces are acting on an object?
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Sum up all the forces vectorially acting on the object.
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Why is understanding the laws of motion important in engineering?
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They provide fundamental insights that help in designing mechanisms and systems that function under real-world force conditions.
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