Unit 1: dynamics Flashcards
inertia
the property of matter that allows a body (object) to resist changes to its state of motion
types of friction
static friction, kinetic friction, air resistance
friction
force that opposes the sliding of two surfaces across one another
static friction
resists attempted motion between two surfaces in contact
kinetic friction
force exerted on a moving object by a surface in contact with the object
air resistance
friction between objects & air around them
inertial frames of reference
a frame of reference that moves at a zero or constant velocity
non-inertial frames of reference
these are accelerating frames
fictious force
an apparent but non-existent force invented to explain the motion of objects within an accelerating (non-internal) frame of reference
centripetal acceleration/force
the acceleration acts to the centre of the circle, this implies that the net force creating the acceleration must also act to the centre of the circle
centrifugal acceleration/force
fictitous force in a roatating frame of reference, aka the non-inertial frame of reference
two benifits of banked curve
- the bank curve increases the normal force increasing the frictional force allowing cars to drive faster and safly around the curve
- FNx helps to push the car around the curve
centrifuge
a rapidly roatating device used to seperate substances & simulate the effects of gravity
artifical gravity
when the value of gravity has been changed artificially to more closley match Earth’s gravity
coriolis force/effect
a fictitous force that acts perpendicular to the velocity of an object in a roatating frame of refernce
