- #1

Can you guys help me with a physics question? What theories, laws, forumlas, equations, etc. can be used to prove and predict an object's motion? Can you guys please include an example also? Thanks.

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- Thread starter daodude1987
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- #2

Ambitwistor

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- 1

For instance, if you have an object moving due to a uniform gravitational force F = mg, then from F = ma,

a = d

Integrating gives

v = dx/dt = gt + (a constant)

If we apply an initial condition that v(t=0) = v

Integrating again,

x = v

Applying x(t=0) = x

x = x

The trajectory is a parabola.

- #3

force = mass * acceleration.

That's all there is to it.

That's all there is to it.

- #4

Another law is that for every action there is and equal and opposite reaction. That is if press your finger on a scale until the scale reads 1 pound, you feel 1 pound of force on your finger.

These laws make mechanical motion of a body predictable if you know the forces acting on the body.

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