Final Concepts Review Flashcards
Define kinematics and kinetics
Kinematics- the study of motion of mechanical points, bodies, and systems
Kinetics- the study of force acting on mechanisms
Describe linear and angular motion
Linear- motion in which an object moves from one point to another in a straight line
Angular- motion where a body moves along a curved path at a consistent angular velocity
What is the difference between a scalar and a vector?
Vectors have both magnitude and direction
Scalars have only magnitude
What is displacement? How are distance and displacement different?
Distance is a scalar quantity that asks “how much ground has been covered” by an object
Displacement is a vector quantity that focuses on how far out of place an object’s change in position
What is the difference between average and instantaneous velocity?
Average velocity occurs over the total time travelled, while instantaneous velocity is calculated at set points.
What does going from a positive to negative displacement mean?
Positive displacement indicates that the object has moved up, forwards, or to the right while a negative displacement indicates a down, backwards or left movement
What is velocity? How are velocity and displacement related?
Velocity is the rate displacement changes with time a (vector)
v= d/t
What does a change in direction mean in terms of a velocity vector?
A change in direction will be seen as a change in velocity and acceleration
What is acceleration? How are velocity and acceleration related?
Acceleration is movement causing a change in velocity
a= (vf-vi)/t
What happens to velocity if there is no acceleration? Can velocity and acceleration be in different directions? What happens when this is the case?
Velocity will remain constant
When acceleration and velocity are in different directions (example: slowing down will cause both quantities to become opposite)
