Dynamics Flashcards
defined as a push or pull
force
force Has a unit of
newton
newton is equal to
kg.m/s2
Any influence that can change an object’s motion
force
two categories of force
contact force
non contact force
– force directly applied to a body.
contact force
examples of contact force
Normal force
Frictional force
Tension force
Weight
acts through an empty space
non contact force
example of non contact force
Electric field
Magnetism
gravitational
- Types of force
Tensile force (t)
Normal force (Fn
Frictional force (Ff or f)
Weight (W)
compressive
is the force acting along the string when stretched or compressed
tensile force
supporting force perpendicular to the surface area when two objects are in contact with each other
normal force
tangential force acting on an object that opposes the sliding of the object on an adjacent surface in which it is contact
frictional force
static frictional force
fs
kinetic frictional force
fx
sliding frictional force
Fsl
it is the force with which a body is pulled towards the center of the earth due to gravity.
weight
Has a magnitude of mass of the object and gravitational acceleration
weight
– ratio of the frictional force resisting the motion of two forces in contact to the normal force pressing the two surfaces together
coefficient of frictional force
coefficient of frictional force formula
μ=F/N
acts towards a body (ex. String, cables, wires, ropes, etc)
compressive
are diagrams used to show the relative magnitude and direction of all forces acting upon an object in a given situation
free body diagrams
- Three laws of motion
Law of inertia
Law of acceleration
Law on interaction
states that every object continues to remain at rest or in uniform motion in a straight line unless a force acts on it to change its state
law of inertia
law of inertia states
states that every object continues to remain at rest or in uniform motion in a straight line unless a force acts on it to change its state
defined as the tendency of an object to persist in the state of rest or uniform motion in a straight line
inertia
- A 50N force is applied to two objects weighing 10kg and 100kg, respectively
what is the acceleration for both force
a= 5 m/s^2
a= 0.5m/s^2
- Inertia is proportional to
mass
law of inertia formulas
Law of inertia
∑▒〖F=0 〗
∑▒〖Fy=0 〗
∑▒〖Fx=0 〗
newton’s second law of motion
states the acceleration of an object is dependent on the net force acting on the object and the mass of the object.
Fnet formula
ma
states that the acceleration of an objects is directly proportional to the net force acting on it, and is inversely proportional to the object’s mass
law of acceleration
law of acceleration states
states that the acceleration of an objects is directly proportional to the net force acting on it, and is inversely proportional to the object’s mass
