7) Introduction to Mechanics Flashcards by Caleb Pleavin | Brainscape

Q

What are particles

A

Objects that occupy a single point in space (Aka point masses)

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Q

What is velocity

A

Time derivative of the position vector

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Q

What is speed

A

The absolute magnitude of velcoity
|v(t)|

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Q

What is the direction of the velocity vector

A

v(t) is tangent to the trajectory of the
particle at the location r (t)

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Q

What is momentum

A

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Q

What is acceleration

A

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Q

What Newton’s 2nd Law of Motion

A

F = ma

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Q

What is Weight

A

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Q

What is Drag

A

where γ is some positive constant

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Q

What would be the equation for result force on a particle

A

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Q

What is the position vector for circular motion

A

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Q

What is the vecloity for circular motion

A

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Q

What is the acceleration for circular motion

A

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Q

How is the path of a pendulum defined

A

ℓ is the length of the rod

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Q

What is the acceleration of a pendulum

A

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Q

What is the tension of a rod

A

Q

What is the equation of motion for a pendulum

A

Q

What is a unit vector of circular motion

A

Q

What is a force field

A

A force field is a force acting on a particle which depends only on the position of that particle
e.g (Gravity is a force field, the tension in the pendulum rod would not be)

Q

What is a central force field

A

A central force field is one which has magnitude depending only on the distance to the origin, and has direction parallel to the particle’s position vector.

Q

What is the equation of a central force

A

Q

What is newtonian gravity

A

G ≈ 6.67×10−11m^3kg^−1s^−2 is the gravitational constant

Q

What is electrostatic repulsion

A

k ≈ 8.99N m^2C^−2 is Coulomb’s constant

Q

Describe circular motion for central forces

A

Q

What is the period of motion

A

Q

What is a conservative force field

A

Q

What is potential energy

A