Free Body Diagrams and Newton's laws

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What is a Free Body Diagram?

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A Free Body Diagram (FBD) is a graphical representation used to visualize the forces acting on an object. It shows all the external forces acting on the body, represented as arrows pointing in the direction of the force.

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What does Newton's 1st Law state?

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Newton's 1st Law, also known as the Law of Inertia, 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 is acceleration?

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Acceleration is the rate of change of velocity of an object with respect to time. It is a vector quantity, meaning it has both magnitude and direction.

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What is the formula for calculating net force?

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Net Force (F_net) = mass (m) × acceleration (a).

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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 can be expressed as F = ma.

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What is frictional force?

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Frictional force is the force that opposes the relative motion of two surfaces in contact. It acts parallel to the surfaces and can be static or kinetic.

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What is weight force?

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Weight force is the force exerted by gravity on an object. It is calculated as the product of the object's mass and the acceleration due to gravity (W = mg).

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What is thrust?

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Thrust is the force that propels an object forward, typically produced by engines or propellers. It acts in the direction of the object's motion.

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What is buoyant force?

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Buoyant force is the upward force exerted by a fluid on an object submerged in it. It opposes the weight of the object and is responsible for the phenomenon of floating.

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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. This means that forces always occur in pairs.