S: Balanced and Unbalanced Forces Lab
FC: Kristen Cordero Feb. 17, 2012 10th Grade | Balanced and Unbalanced Forces Lab
2: Introduction The sum of two or more vectors is called the resultant, while an equilibrant is a vector that can exactly balance the result. If three or more forces at in opposition to one another so that they are balanced, any one of the forces can be considered the equilibrant of the others.
3: Objectives *Practice vector addition using components. *Observe the relationship between the resultant and the equilibrant. *Gain experience using a simple force table. *Determine the weight exerted by a known mass. | Materials Force Table Including 3 pully clamps Metric Mass Set
4: Procedure | Setup | 1. | 1. Setup the Force Table. | 2. Fasten three strings to the ring by tying a small loop in each string.
5: 3. Place the ring with its three strings over the force table's center peg. | 4. Thread the loose ends of the strings over the pulleys. Tie a loop at the end of each string.
6: 5. Attaches the masses to the three strings. a. 200 g of both String 1 and String 2. Attach 350 g to String 3. | 6. Arrange the pulleys. String 1: 0 mark String 2: 55.0 mark (counterclockwise) Move the third pulley to the left or right until the ring in the center is exactly centered over the peg.
7: Procedure Trial 1 | 7. Record in Table 1 the magnitude of the force on each of the three strings.
8: Trial 2 | 8. Replace the masses. String 1: 150 g at 0 String 2: 250 g at 65 | 9. Move the pulley containing String 3 to the left or the right and add additional mass to the string as necessary until the ring is centered over the peg.
9: 10. Record in Table 1 the magnitude of the force for each string and the direction of the third string.
10: Force Table Angles and Forces | F1: 1.962 N Direction: 0 | F2: 1.962 N Direction: 55 | F1: 1.472 N Direction: 0 | F2: 2.45 Direction: 65
11: Data | Table 1 | F3: 3.43 N Direction: 205 | F3: 3.34 Direction: 223
13: PostLab Exercises