Newton's 3rd Law
Static Friction
Learning Objectives
 | Accurately measure and record data. | ||||||||
| Identify the equations to calculate:
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| Compare and identify differences in normal force and static friction force between different angles. | ||||||||
| Apply this experience to homework problems. |
Equipment
Incline ramp, friction blocks, and masses.
Procedure
1. Weigh the assigned block to determine the mass in grams. For the metal friction block use the Large balance scale.
2. At different angles, add mass to the tray to determine the maximum Tension just before the friction block starts to move.
Use the Friction Data Collection Worksheet to calculate the Tension from the masses placed in the tray, normal force (n), static friction force (fs), and coefficient of friction.
| g = 9.8 m/s2 (down to floor) |
| Fg must be calculated in Newtons! |
| T = Mtray * g = Fg (down to floor) |
| normal = Fg-adj = Fg * (cos θ) Hint: n is directed up from the incline |
| fs = -(T - Fg-opp) = -(T - (Fg * (sin θ))) Hint: fs is directed along the incline |
| μs = |fs|/n |
2. Complete the Chapter 6 Work and Energy assigned problems.
Homework and Lab Report are both due at the next class.