Dynamics Flashcards
newtons first law
an object remains at rest until acted on by an external force
acceleration and resultant force are ___________ proportional
directly
terminal velocity is when
fluid resistance = weight of the object
types of forces
push/pull
weight
friction
tension
upthrust
drag
contact force
formulas for acceleration
a = F/m
a = (v-u)/t
newtons first law
an object will remain at rest or in uniform motion unless acted on by another force
newtons second law
resultant force is proportional to mass x acceleration. F= m.a
newtons third law of motion
when 2 bodies interact with each other, they exert equal forces on each other in opposite directions
Describe and define inertia
Its difficult to make an object of large mass start/stop moving. Tendancy for an object to resist any change of state of uniform motion.
A measure of how difficult it is to change an object’s speed,velocity or direction because of the mass. Massive objects have large inertia
objects of different masses fall at the same rate because
they both experience the same acceleration
Top speed
reached when thrust has overcome theair resistance
terminal velocity
maximum velocity reached by an object when falling under gravity
Prefixes:
Multiples
Sub-multiples
Multiples:
Kilo < Mega < Giga < Tera
Sub-multiples
Deci < Centi < Milli < Micro < Nano < Pico
W =
mass x gravity
what is contact force
force at right angles to a surface when 2 objects are in contact
