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3rd 9 Weeks Physics Exam Study Guide
Terms in this set (46)
Unit for Momentum (p)
Unit for Mass
Unit for Velocity
Unit for Force
Unit for Time
Unit for Energy/Work
Unit for Power
Unit for Distance (d)
Unit for Acceleration Due to Gravity (g)
Unit for Spring Constant (k)
Unit for Height
Unit for X (Distance)
A measure of how hard it is to stop a moving object; it is the product of the object's mass and its velocity.
The force that is exerted to change the momentum of an object. Impulse is in Ns.
The product of a rotating object's moment of inertia and its angular velocity. If there is no torque acting on an object, its angular momentum is constant.
A term that describes a collection of objects.
The mass remains constant in a ______ system.
A _______ system is one in which no external force acts.
Total momentum and total energy is conserved; ______ collisions only occur on the subatomic particle level.
The total momentum is conserved; real life collisions are _______.
If two objects stick together after the collision, it is said to be ____________.
The ability to do work.
Conservation of Energy
Energy must be transferred into different forms.
Work causes a change in an object's kinetic energy; if you want to change the kinetic energy of an object, you must do work on it.
The energy due to the motion of an object.
Gravitational Potential Energy
The energy of an object due to its position in a gravitational field.
The energy of an object due to an object's position.
The position where the potential energy of an object is defined to be zero. The higher an object is above ____________, the greater its gravitational potential energy.
A ____________ depends on the initial and final positions, not the path taken to get from the initial to the final position.
A _________ is dependent upon the path taken between the initial and final points. The work done by the _______ is equal to the sum of the changes in the potential and kinetic changes.
The transfer of energy that occurs when a force makes an object move.
• The object has to move.
• The motion of the object must be in the same direction as the applied force.
Two conditions have to be satisfied for work to be done on an object:
The amount of work done in a certain amount of time.
It describes the restoring force of a spring as Fs=-kx.
Elastic Potential Energy
The potential energy stored in an object that is released as kinetic energy when the object undergoes a change in form or shape.
The sum of the potential and the kinetic energies of an object.
A device which carries a static magnetic field around with it.
The force is greatest next to a _____, which is the north (___) or south (____) end of a magnet.
A field present around a magnet which exerts a force on other magnetic materials.
Magnetic field lines start from the ___ pole and run to the ___ pole.
The ___ end of the compass aligns with the south end of a compass.
The North geographic pole is the ___ magnetic pole. (And vice versa)
Perform like magnets when in the presence of a magnetic field, but lose magnetism when not in a magnetic field.
Created by placing material into a very strong magnetic field. It will allow the material to maintain the magnetic properties even after being removed from the field. Only a few materials exhibit magnetic properties of significant strength. These martierals are:
• some of their alloys
• a few rare earth elemetns
aorta of these elements are slightly magnetic. Individually, this produces no noticebale effect. But if the atoms all align with each other, then the metal will display magnetic properties.
Atom Alignment is....
This machinery uses magnetism and radio waves to map the inside of a person's body.
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