Hello Course Hero,

I need help with the empty tables in the Expected Value and Percent Error columns. What are the answers that go in here? Also, I need help answering post questions 1 and 4.

Anthony J Castello

5822829

PHYS 133

Circular Motion

Experiment 1: Balancing Centripetal Force

Data Sheet

Table 1. Rotational Data

Radius (m)	Time per 15 revolutions (s)	Period (s)	Expected Value	Percent Error (%)
0.25	5.44 (s)	0.36 (s)
0.40	6.97(s)	0.46 (s)
0.15	4.87 (s)	0.32 (s)

Post-Lab Questions

1. Compare your measured data to your predicted values with a percent error calculation. Explain any differences with an error analysis

2) List all of the physical quantities that affect the value of centripetal force.

The physical quantities that affected the value of the centripetal force were; velocity, radius of the circle and mass of the object.

3) How did the period of rotation vary as you changed the radius?

The period of rotation increased as the radius increased.

4) Draw a circle to represent the path taken by your rotating mass. Place a dot on the circle to represent your rotating washer. Add a straight line from the dot to the center of the circle, representing the radius of rotation (the string). Now label the direction of the tangential velocity and the centripetal force.

5) Refer to the picture in Figure 3 again (pictured below). Before the apparatus begins to spin the wires connecting the swings to the top of the structure will be completely vertical. Once the apparatus begins to spin the swings move outward radially, but also upwards vertically. From where does the force causing this vertical acceleration come?

The vertical acceleration comes from the tension of the wire. Therefore, acceleration increases causingthe chairs to move upward.

Figure 3: Swings at an amusement park exhibit a circular path of motion.