Name: ACI; SPH3U Pendulum Motion https://phet.colorado.edu/sims/html/pendulum-lab/latest/pendulum-lab_en.html Select Lab Set the following parameters: Length 0.7 m Gravity Earth Mass 1.0 kg Friction None A: Intro to Pendulum Motion 1. Pull the pendulum bob to the side and release it. Describe the motion of the bob. What is different about this motion compared to other motions we have studied in Gr. 11 physics? 2. How far to the two sides of the equilibrium position does the bob oscillates? How do these compare? 3. What happens to the speed of the pendulum bob as it (a) swings away from the equilibrium position and (b) toward the equilibrium position? 4. At what position(s) is the speed of the pendulum bob at its maximum value? At what position(s) is the pendulum bob instantaneously at rest? (Select velocity box) 5. What is the direction of the acceleration when the pendulum bob is (a) at the right side of the equilibrium position and (b) at the left side of the equilibrium position? (Select acceleration box.) 6. At what position(s) is the acceleration of the pendulum bob at its maximum value? minimum value? B: Cycles and Periods . A cycle is one complete oscillation, starting and ending at the same position after completing one whole motion. The time to complete one cycle is called the period (T). 1. Measure the period of the bob's oscillations. Use the stopwatch on the simulation.Name: AC1: SPH3 U 2. On a graph of displacement vs. time, plot ve points that correspond to (a) the left most position (negative) (b) the equilibrium position (0) the right most position (d) the equilibrium position (e) the left most position. How are points will each be separated in time? Interpolate what you think the rest of the graph between these points might look like. 3. How many cycles does your object go through in 5 seconds? C: Phase Consider the graph to the right showing the position vs. time for an oscillating object. 1. Draw the position of the object and spring according to the graph for each moment in time labeled in the diagram below. 2. Draw a vector beside each image of the object showing its instantaneous velocity. If it is zero, write a zero. 0 The phase of a particle in periodic motion indicates its state at one moment in time. The state of the oscillating particle can be completely described by its position and velocity. 0 Phase is most often used for making comparisons. When two states are identical, they are in phase. Otherwise they are out of phase. When two states are half a cycle apart they have opposite phase. 3. Find all the points which have the same phase as: B: C: D: 4. Find all the points that have the oppOsite phase as: A: B: D