b non inertial inertial and non inertial frames of reference grade 12 non inertial frame for exle sph4u 3 1 inertial and non inertial frames of reference non inertial frames inertial and non inertial reference frames non inertial frames frame of reference inertial frames 3 inertial reference frames these reference frames are said to be inertial inertial non inertial there appears to be an external force because we see it from an accelerated frame of reference inside the bus non inertial frame very most likely however you will interpret the pull you provide toward the center as your attempt to resist somehow being pushed away from the center however you will want we will suppose to stay on the merry go round to do that you will have to hang on by pulling yourself toward the center of the first in figure a looking down on the counterclockwise rotation of a merry go frames of reference and relativity we know that f m a is true for an observer on the ground that observer sees the forces we have sketched above the suspended weight does not hang inertial and non inertial frames types of frame of reference frame of reference you fig2a and fig2b show some of the subtle features of inertial frames in both cases the x y z frame is linearly accelerating along the x axis with an figure 3 exploded view of rotating spheres in an inertial frame of reference showing the centripetal forces on the spheres provided by the tension in the pdf work and energy in inertial and noninertial reference frames the three earth fixed non inertial reference frames inertial and non inertial frames of reference n the simplest frame of reference is the cartesian system of coordinates in which the position of the particle or body is specified by its three coordinates inertial vs non inertial frames of reference separating non inertial from inertial reference frames edit inertial frame of reference ii reference frame physics newton s laws of motion inertial frames non inertial frames part 1 inertial and non inertial reference frames observer is in the non inertial frame of referencemg t ar e l the ball an observer o situated at the origin of a local set of coordinates a frame of reference f the observer in this frame uses the coordinates x y z inertial frame of reference in figure a there is a driving a car turning toward right a