biomechanics lab :1

not finished ive given up

kinetics is concerned with ______ that act on a _____

forces, system

kinetic is _____, kinematics is ______

force, motion

define torque

rotation about an axis

mass

quantity of matter or amount of stuff in an object

weight

the force that gravity exerts upon a body

inertia

resistance to motion

for an object to move it must do what?

overcome inertia

momentum

product of the mass of a body and it’s velocity

to change the momentum of an object, ______ _____ must be applied to it

external force

newtons 1st law: _______ (define)

inertia, a body will remain in current state of motion unless acted upon by an external force

newtons 2nd law: _______ (define)

acceleration, an applied force causes an object to accelerate in proportion to magnitude of force and in same direction as force.

newtons 3rd law: _______ (define)

reaction, when one body applies force to another body, the second body applies an equal and opposite reaction force to the first body

the two kinetic measures are what?

linear and angular

in kinetics linear uses _____ and angular uses moment of _____

mass, inertia

Vector is a value made up of ______ and _______

direction and magnitude

line of application

straight line of infinite length in direction in which force is acting

point of application

specific point at which force is applies, determines whether resulting motion is linear, angular, or both

what is depicted by the length of the arrow?

magnitude

inertial force

one segment exerts force on another segment but not through muscle actions, ex in walking the proximal segment exerts inertial force on distal segment

center of gravity

the point where the force of gravity reacts on the body. refers only to vertical direction in which gravity acts

center of mass

the single point where the body’s mass is evenly distributed in all directions. the com changes when body position changes like raising arms, bending etc.