which is orthogonal both to the velocity relative to the centre of the star, and to the main rotation axis. Conny Modig is high school teacher at Gymnasium Skövde Västerhöjd. Understanding the Physics behind Pendulum Ride. For small oscillations, how do length or gravity affect the period or frequency of the oscillation?

(Bringing along a soft mug with a small quantity of liquid in a swing leads to analogous surprises [9, 13–15]). For Loke we expect |\Omega| \leqslant 1.1 rad s−1, in good agreement with the data shown in figure 7, collected using a smartphone.

The process is related to the centripetal force which indicates that at the bottom of the circular swing, there must be an upward force (since the circle’s center is upward). The interpretation of the data from smartphones offers good practice in identifying coordinate axes [7–9], useful also in interpreting data from other acceleration and rotation sensors commonly used in high school physics classes [10, 11]. When the circle is in the lowest point, the z axis coincides with the Z axis in the fixed coordinate system, where we let the X be the pendulum axis, as shown in figure 9.

To find out more, see our, Browse more than 70 science journal titles, Read the very best research published in IOP journals, Read open access proceedings from science conferences worldwide, Cambridge Assessment International Education, Aerodynamics in the amusement park: interpreting sensor data for acceleration and rotation, Acceleration and rotation in a pendulum ride, measured using an iPhone 4, Student investigations of the forces in a roller coaster loop, Beyond velocity and acceleration: jerk, snap and higher derivatives, Acceleration in one, two, and three dimensions in launched roller coasters. The corresponding data for Loke are shown in figure 6.

In addition to swinging back and forth, some designs incorporate rotating gondolas and may send riders through a complete inversion. Try using the graph and changing parameters like mass, length, gravity to answerthese questions (leave damping at zero to simplify things): 1.

Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Many problems can be avoided if the students have the opportunities to test the equipment in familiar and simple situations, such as elevators or playground swings, where the motion can be easily understood and related to the data collected.

KidieZone is a platform to showcase kids talent. In addition to swinging back and forth, some designs incorporate rotating gondolas and may …



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