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Dynamics: Particle Motion
This set of cards covers the definitions of terminolgy used in Engineering Mechanics: Dynamics covering the topic of particle kinematics (motion)
27
Engineering
Undergraduate 1
01/24/2022

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Term
acceleration
Definition
the time rate of change of velocity of a body
Term
angular acceleration
Definition
the time rate of change of angular velocity with its ± sign from the right-hand rule
Term
angular acceleration
Definition
how quickly or slowly the rate of rotation changes
Term
angular velocity
Definition
the time rate of change of angular position with its ± sign from the right-hand rule
Term
curvilinear motion
Definition
the motion of a moving particle along a non-linear, or curving, path
Term
dynamics
Definition
the study of how objects move, both independent of forces and under the influence of forces
Term
kinematics
Definition
the study of particle or rigid body motion relating their position, velocity, and acceleration
Term
linear motion
Definition
movement along a straight path
Term
normal acceleration
Definition
the time rate of change of a particle's velocity **direction** that is directed toward the center of curvature
Term
radial acceleration
Definition
the time rate of change of radial velocity which is parallel to the position vector r
Term
radial acceleration
Definition
the change in speed of a particle is getting closer to or further away from the origin of the axis system
Term
rotation
Definition
the turning movement of an object around a point
Term
transverse acceleration
Definition
the linear acceleration caused by rotation of a point around a fixed axis which lies perpendicular to the position vector r
Term
linear velocity
Definition
the time rate of change of distance along a path
Term
tangential acceleration
Definition
the time rate of change of an object's velocity magnitude along it's path
Term
angular position
Definition
the angle from a datum measured in the positive right-hand rule direction
Term
right-hand rule
Definition
the sign convention to determine the ± sign on cross products and rotational motion
Term
radius of curvature
Definition
radius of a circle fit to the current position of a particle on a curved path
Term
tangential axis
Definition
reference axis pointing in the direction of a particle's current velocity
Term
normal axis
Definition
reference axis pointing towards the particle's current center of curvature
Term
radial axis
Definition
reference axis pointing from a reference point through the particles current position
Term
transverse axis
Definition
reference axis pointing from the particle and in the direction of an increasing angular position θ
Term
normal acceleration
Definition
always zero if the particle is moving along a straight path
Term
absolute velocity
Definition
the velocity with respect to a non-moving reference point
Term
relative velocity
Definition
the velocity relative to a moving body or reference point
Term
absolute position
Definition
the location of a particle with respect to a non-moving reference point
Term
relative position
Definition
the location of a particle relative to a moving body or reference point
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