Forces
A law that says the net, external force on a system is proportional to the mass of the system times the net acceleration.
What is Newton's second law?
What is kinetic energy?
The "stored" energy a system has due to either a spring or interaction with a gravitational field.
What is potential energy?
A quantity describing how quickly an object is rotating.
What is angular velocity?
At the earth's surface, this quantity has a value of 9.81 m/s/s.
What is acceleration due to gravity?
Motion that describes an object moving in a circular path with a constant speed.
The point within a system where the total mass of the system can be assumed to be concentrated.
What is center of mass?
The theorem describing how forces change the kinetic energy of the system.
W=ΔK
What is work-kinetic energy theorem?
The tendency of an object to resist changes in angular motion, it depends on the axis of rotation.
What is moment of inertia?
What is inertia? (What is mass? is also acceptable).
Air resistance and friction are two examples of these types of forces.
What are resistive forces?
The area under a force vs time graph, also a measure in change in momentum.
What is impulse?
This quantity is a measure of change in energy with respect to time.
What is power?
Torque is calculated with this mathematical operator, which is found by multiplying the magnitudes of two vectors by the sin of the angle between them. Its direction is found by the right hand rule.
What is the cross product?
An inverse square law that describes gravitational attraction between masses anywhere in the universe.
What is Newton's law of universal gravitation?
The point at which static friction reaches is maximum value.
What is the threshold of motion/impending motion?
Without this type of force present, momentum is conserved.
What is an external force?
A force that obeys the following two principles:
1. The work done is independent of the path the force is applied along
2. If the path ends and begins at the same place, the work done is 0.
What is a conservative force?
One of two equations for angular momentum, this equation is best applied to an object moving translationally.
What is rmvsin(θ)?
The velocity needed for an object to escape a planet's gravitational pull.
What is escape velocity?
What is a restoring force?
An experimental set up in which conservation of momentum and energy are applied to a projectile colliding with a swinging pendulum.
What is a ballistic pendulum?
A system for which matter cannot cross the system barrier, but energy can.
What is a closed system?
This law, built upon the conservation of angular momentum, establishes an inverse relationship between orbital speed and orbital radius. Colloquially, it is worded as "The planets sweep out equal areas in equal times".
What is Kepler's Second Law?
Unlike a spring force, which typically depends on position, air resistance depends on this variable.
What is velocity?