Torque + Simple Machines
Rotational Analogs
Electricity
Magnetism.
Momentum
100
The potential for a force to cause a change in rotational motion.
Torque.
100
Give the rotational equivalent for each linear kinematic component (i.e, give velocity, acceleration, and delta X in its rotational form).
Velocity = omega
Acceleration = alpha
Delta x = delta theta.
100
Conductors allow the movement of this to be easier within.
Electrons.
100
The magnetic South of the Earth is where, relative to the geographic poles of the Earth.
Near the geographic North.
100
The change in momentum
Impulse
200
Mechanical advantage is how much a simple machine can reduce the force needed for work to be done. What's the formula for mechanical advantage?
Fout/Fin
200
The conversion factor between linear motion and rotational motion (I.e, how to change x into theta, v into omega, and a into alpha).
Multiply the linear component by the radius "r."
200
In an irregularly shaped conductor, charges accumulate here.
The place where the point of the curve is the sharpest.
200
A long, helically wound coil of insulated wire that can produce a temporary magnetic field.
Solenoid.
200
The idea that, with an applied net force on an object over time, the force will cause a change in momentum.
Impulse-momentum Theorum.
300
The resulting torque of a parallel distance (4m) between the axis of rotation and the direction of the force (magnitude of 5N). Give the answer in a number.
0.
300
Equation for rotational kinetic energy.
1/2 I *omega*2
I = moment of inertia.
300
What is a "fundamental charge" and what does it represent?
"e," a charge, in coulombs, for a single electron/proton.
300
If a proton travels up in a magnetic field, then an electron will travel in this direction in the same magnetic field.
Downwards/opposite direction.
300
3 Types of collision for momentum: Explosion, perfectly inelastic, and perfectly elastic collisions. Describe each collision.
Explosion: initial momentum = 0, sum of final momentum = 0 with a nonzero Vf
Perfectly inelastic: both objects travel with the same Vf (essentially stick together and become one mass)
Perfectly elastic: Some momentum is transferred with all kinetic energy preserved.
400
If an object is spun around in a horizontal circle at the end of a rope, and the rope is suddenly cut in half, how will its motion be affected.
Angular velocity will increase as r decreases in 1/2mr2*omega*
400
In series, the current and the voltage change or stay the same.
In parallel, the current and voltage change or stay the same.
Series: current stays the same while voltage changes.
Parallel: current changes while voltage stays the same.