Angular acceleration: Part 1

The purpose of this lab is discovering what are factors affect the angular acceleration of a object.

As the picture shows, we set up those devices to study some factors such as the mass of disk, the force dragging the disk,and the diameter of the torque pulley.

However, we need to measure them first.

data:

the diameter and mass of the top steel disk: 126.2 mm 1361 g

the diameter and mass of the bottom steel disk: 126.2 mm 1348 g

the diameter and mass of the top aluminum disk: 126.2 mm 464.5 g

the diameter and mass of the smaller torque pulley: 24.9 mm 10 g

the diameter and mass of the larger torque pulley: 49.8 mm 36.3 g

the mass of the hanging mass supplied with the apparatus: 24.5 g

After we measured those data,we need to determine different angular acceleration of different situations with the device.

In those picture, we can get two angular accelerations of each situation, and we calculate the average of two angular accelerations.

        grams actually hanging      torque  pulley       disk         a

1         24.5 g                      small             steel      1.1375 rad/s

2         50 g                        small             steel      2.293 rad/s

3         75 g                        small             steel      3.4625 rad/s

4         24.5 g                      large             steel      2.213 rad/s

5         24.5 g                      large             aluminum   6.2135 rad/s

6         24.5 g                      large             steel      1.1777 rad/s
conclusion:

From this table,we can see that the angular acceleration will increases as the force dragging the disk, the angular acceleration will increases as the diameter of torque pulley is bigger, and the angular acceleration will increases as the mass of the object is decreasing.