Level 126
Level 128

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Arc Length

Linear distance around a circle

pit

a tiny indentation on the spiral track moulded into the top of the polycarbonate layer of CD

rotation angle

the ratio of the arc length to the radius of curvature on a circular path:Δθ=Δs/r

Radius of curvature

r is (-)= convex mirror-> power is negative

radians

a unit of angle measurement

angular velocity

represented by a lower case omega (ω)

centripetal acceleration

a = centripetal acceleration

ultracentrifuge

a centrifuge optimized for spinning a rotor at very high speeds

Centripetal Force

A force directed towards the center of a circle that causes an object to follow a circular path

ideal banking

the sloping of a curve in a road, where the angle of the slope allows the vehicle to negotiate the curve at a certain speed without the aid of friction between the tires and…

ideal speed

the maximum safe speed at which a vehicle can turn on a curve without the aid of friction between the tire and the road

ideal angle

the angle at which a car can turn safely on a steep curve, which is in proportion to the ideal speed

banked curve

the curve in a road that is sloping in a manner that helps a vehicle negotiate the curve

fictitious force

a force having no physical origin

centrifugal force

a fictitious force that tends to throw an object off when the object is rotating in a non-inertial frame of reference

Coriolis force

the fictitious force causing the apparent deflection of moving objects when viewed in a rotating frame of reference

non-inertial frame of reference

an accelerated frame of reference

gravitational constant, G

a proportionality factor used in the equation for Newton's universal law of gravitation; it is a universal constant—that is, it is thought to be the same everywhere in the universe

Center of mass

same as center of gravity

microgravity

an environment in which the apparent net acceleration of a body is small compared with that produced by Earth at its surface

Newton's universal law of gravitation

every particle in the universe attracts every other particle with a force along a line joining them; the force is directly proportional to the product of their masses and inversely proportional to the square of the distance between them