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flyingpig
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flyingpig said:Homework Statement
In frame of reference where ther are no external, unbalanced forces, show that Newton's Second Law includes the Law of Inertia
Homework Equations
f=ma
The Attempt at a Solution
I thought the Law of Inertia is only in the First law, the second law states that unless you push an object, the velocity of that object would not change.
ideasrule said:No, that's the first law. The second law is F=ma.
flyingpig said:I know, read my question...it wants me to explain that.
ideasrule said:I don't think we're understanding each other. You said:
"the second law states that unless you push an object, the velocity of that object would not change."
It's the first law that says that, not the second. The second law is F=ma. The question wants you to explain why F=ma implies that unless you push an object, the velocity of that object would not change. To begin, what would "F" be if you don't push an object?
Newton's laws of motion are three physical laws that describe the relationship between an object's motion and the forces acting on it. They were first described by Sir Isaac Newton in his book "Philosophiæ Naturalis Principia Mathematica" in 1687.
The first law of motion, also known as the law of inertia, states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
The second law of motion states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration. This can be represented by the equation F=ma, where F is force, m is mass, and a is acceleration.
The third law of motion, also known as the law of action and reaction, states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on another object, the second object will exert an equal and opposite force back on the first object.
Newton's laws of motion can be applied to a wide range of real-life situations, from the motion of objects on Earth to the movement of planets in the solar system. For example, the first law explains why a book remains on a table unless someone picks it up, and the third law explains how rockets are able to launch into space by pushing against the ground with a powerful force.