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Questions and Answers
What is the tendency of an object to resist changes in its motion?
What is the force of gravity proportional to?
What is the direction of the force and acceleration always in?
What happens to an object in motion when no external force is applied?
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What is the formula for the force of gravity?
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What happens to the acceleration of an object when the force applied to it is increased?
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Study Notes
Newton's Laws
Inertia
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First Law: Law of Inertia
- An object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force.
- Inertia is the tendency of an object to resist changes in its motion.
- Inertia is a fundamental property of an object and is dependent on its mass.
Gravitation
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Universal Gravitation
- Every point mass attracts every other point mass by a force acting along the line intersecting both points.
- The force of gravity is proportional to the product of the two masses and inversely proportional to the square of the distance between them.
- F = G * (m1 * m2) / r^2, where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses, and r is the distance between them.
Force and Acceleration
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Second Law: Force and Acceleration
- The force applied to an object is equal to the mass of the object multiplied by its acceleration.
- F = ma, where F is the net force acting on an object, m is its mass, and a is its acceleration.
- The direction of the force and acceleration are always in the same direction.
- The more massive an object, the less it will accelerate when a given force is applied.
- The greater the force applied, the greater the acceleration of the object.
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Description
Test your understanding of Newton's three laws of motion, including the law of inertia, universal gravitation, and force and acceleration. Learn how to apply these laws to real-world problems and understand the fundamental principles of physics.
