Like linear kinematics, position, speed, and acceleration have the right to be used to define circularmotion. Objects v circular activity rotate about a certain point while also moving throughspace. Every points on a uniformly rotate object will spin at the exact same rate and also will have actually the sameangular distance. However, the tangential speeds of every points that the object will certainly not be the same.The speed counts on how far the allude is indigenous the facility of rotation. This can be defined withthe equation v = rw. For this reason the additional the suggest is to the center of rotation, the bigger the tangentialvelocity.

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The direction of activity of an object moving in a circular movement is continually changing.Thus the object has an acceleration also though the magnitude of the velocity the the object maynot change. This is because the direction is always changing. This acceleration is calledcentripetal acceleration and it move perpendicular to the tangential velocity. The centripetal

acceleration (ac) deserve to be displayed by the equation ac=v


, r is the radius of the one motion and also v

is the tangential velocity.

The fulcrum that the iOlab machine is situated at the facility of the mass. In this lab we will usethe accelerometer and gyroscope to measure up the angular velocity and the direct acceleration asthe iOlab maker rotates around its z axis. We will certainly then usage this details to measure up thedistance in between the facility of the iOLab an equipment and the accelerometer. This distance have to bethe very same as the measure value.


1) measure up the distance in between the center of fixed of the iOlab machine and the accelerometer.2) document the an equipment as that thrown in the air and rotates around its z-axis.3) uncover the full centripetal acceleration.4) find the angular speed of the maker as it is in the air.5) Repeat procedures 2-4 two more times because that a complete of 3 times. The an equipment should it is in thrown at different angular speeds each time.6) Plot ac matches w7) Plot ac versus w 28) uncover the radius the the rotation and also compare it come the measured value from step 1.


The ac of run 1 to be 11.65 m/s 2 ± 0.87 m/s 2 and also the ω of run 1 is -17.910 rad/s ± 0.rad/s. The ac of operation 2 to be 7.99 m/s 2 ± 1.18 m/s 2 and also the ω of run 2 is -14.378 rad/s ± 0.16 rad/s.The ac of operation 3 was 17.08 m/s 2 ± 1.49 m/s 2 and the ω of run 3 is 21.719 rad/s ± 0.22 rad/s.


Run 1:

ax = 4.771 m/s 2 ± 0.48 m/s 2

ay = -10.624 m/s 2 ± 0.72 m/s 2

ac 1 =√4.771 2 +10.624 2 =11.65m/s 2

∆S = √∆ A 2 +∆B 2 =√0.48 2 +0.72 2 =0.


From the measured accelerations of the x and y axis, we check out that the acceleration in the xdirection is positive during the throw and also the acceleration is an adverse during the throw. Thistrend holds throughout all 3 runs. This trend might be due to the direction the the maker was spun onthe z-axis. I spun the maker in a counter-clockwise fashion. If i spun the device in a clockwisefashion the x axis may have actually been negative and the y axis would have actually been positive.

In this experiment us measured the full centripetal acceleration by making use of theacceleration in the x and also y direction. This 2 values deserve to be provided to find acceleration the thefulcrum the the iOlab device outwards. The gyroscope tells us the angular rate of the device. Ifwe look ago at the equation in the introduction. We can plot centripetal acceleration v. Angularspeed to uncover the radius the the rotation. Figure 1 and figure 2 show us that relationship. Howeverthe 2 values differ significantly. These worths are additionally different from the measured value of0.042 m ± 0.005 m.

The far-ranging difference in the measured values and the calculated values of the radiusof rotation probably stems from the inaccuracy of the acceleration measure up of the iOlabdevice. The median percent error the the measurement of acceleration is 10.3%. This, while not avery large error, might have contributed to the differing values. The error that the measured worth ofthe radius is tiny so the is i can not qualify to have impacted the outcomes significantly.

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I have only done 3 trials the the experiment. With repetitive trials, the results must beclearer and closer to the measured value. I additionally may have actually sampled mistakenly from the originalacceleration plots. I might not have included the beginning and also the end of the throw, hence makingit so the my end an outcome is wrong also if mine calculations space correct.