forces and linear kinematics Flashcards
what 3 things does a force have?
- a point of application
– a direction
– a magnitude
what are co linear forces
have same line of actionon same line - maybe jsut diff direction
what are concurrent forces
forces which do not have the same line of
action but act through the same point
How do we find vectors at an angle
find horiz and vertical component then add them
what is motion and what are the three types?
a change in position with respect to space and time
angualr, linear and general
what is linear motion?
ll points on an object move the same
distance, in the same direction, and at the
same time
what are the 2 types of linear motion?
rectilinear translation- motion along straight line
curvilinear translation - along curved path - arc
What is angular motion/rotation?
all points on an object move in a circular
path about the same fixed axis
What is genral motion?
a combination of linear and angular
movements
what are 6 characteristics of linear motion/kinematics
position
– distance travelled
– displacement
– speed
– velocity
– acceleration NOT FORCE
what os position
location in space
what is displacement? What is distance?
the straight line distance in a specific
direction from the start to end position
distance - length of the path followed by the object from the start to end position
what branches off of mechanics - which do we study?
statics and dynamics - we study dynamics (kinematics and kinetics)
example ofn internal force?
tensile(pulling) - msucle force
pushing (compressive) - bone
example of external force?
gravity - nontouching or contact forces (
