Javier colindres (yes I will do 30 by myself) Flashcards
Which factor affects the force of gravity between objects?
Distance
and
Mass
Circular Motion
motion with constant radius of curvature caused by acceleration being perpendicular to velocity
Rotational Speed
the speed with which an object moves through an angle for every unit of time; units: RPM (revolutions per minute), rad/s, θ/s
Formula for Centripetal Acceleration
a = v^2/r = 4rπ^2/T
where v = velocity, r = radius, T = period
Formula for Centripetal Force
F = ma = m(v^2/r)
where m = mass, a = centripetal acceleration, v = velocity, r = radius
Formula for Torque
Torque = r x F
where r = the displacement vector, F = the force vector
If a feather and a hammer are dropped at the same time on the moon, where there is no atmosphere, which one will hit the ground first?
both will hit at the same time
Why does a ball at ground level move downwards?
Gravity pulls the ball toward the ground
A ball on Earth is 1 kg. What is the gravitational force acting on that Ball? (F=mg) (Gravity = 9.8)
9.8 N
Angular Momentum
the quantity of rotation of a body, which is the product of its moment of inertia and its angular velocity
Work
release of Energy in moving an object, force exerted thru a distance w=Fd in Joules
Energy
the ability to do work
Potential Energy
Stored energy, PE=mg (change in) h in Joules
Formula for Rotational Inertia
I = mr^2
where m = mass, r = distance, I = rotational inertia
Formula for Angular Momentum
L = Iω where L (angular momentum) translates to linear momentum (p), and I (moment of inertia) translates to mass (m), and ω (angular velocity) translates to velocity (v). This is the translation from rotational (circular world) terms to linear terms (linear world).
