Introduction and Physical Quantities
The study of matter and energy and their interaction
What is Physics?
A vector quantity whose x-component, the change in the x-component of velocity, divided by the time interval.
What is average acceleration?
Mass in motion. Defined by the mathematical relationship of mass x velocity.
What is momentum?
How fast an object rotates or revolves relative to another point
What is angular velocity?
The ability of an object or material to resume its normal shape after being stretched or compressed; stretchiness
What is elasticity?
An explanation of natural phenomena based on observation and accepted fundamental principles.
What is a theory?
A body is in ______ when it is at rest or moving with constant velocity in an inertial frame of reference.
What is equilibrium?
Equivalent to 1 Newton-meter, this is the SI unit for work and energy
What is a Joule?
A unit of angle, equal to an angle at the center of a circle whose arc is equal in length to the radius.
What is a radian?
The type of force present when a body deforms
What is stress?
A global standard for expressing the magnitudes or quantities of important natural phenomena
What is the International System of Units?
Often labeled as not real, this force is the tendency of an object moving in a circle to travel away from the center of the circle
What is centrifugal force?
The effect of force over time.
What is impulse?
A twisting force that causes rotation
What is torque?
The average location of the weight of an object
What is the center of gravity?
How close the measurements of the same quantity are to each other
What is precision?
Any body that is given an initial velocity and then follows a path determined entirely by the effects of gravitational acceleration and air resistance.
What is a projectile?
The type of energy that only considers the potential and kinetic energies of a body.
What is mechanical energy?
A phenomenon where the axis of rotation gradually changes direction over time due to external forces
What is precession?
The stress required to cause actual fracture of a material.
What is the breaking stress?
The process of objectively establishing facts through testing and experimentation
What is the scientific method?
Known as Newton's third law of motion
What law stated that for every action (force) in nature there is an equal but opposite reaction? (Action-reaction)
The type of collision where kinetic energy is conserved
What is elastic collision?
A device that has a spinning disc mounted on the base so that it can move freely in more than one direction so that the orientation is maintained irrespective of the movement in the base.
What is a gyroscope?
A stress state where the stress is parallel to the surface of the material
What is shear stress?