Lab2S Moving Man Phet Simulation PDF

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Summary

A Phet simulation given by the professor using Phet to determine the answers...

Description

Lab 2S – Moving Man Directions: Download and read this worksheet. Fill in all “Predictions” first and then go to the following simulation: http://phet.colorado.edu/en/simulation/moving-man . The idea here is for you to consider the situation first, determine what you currently think will happen and then put that into the “Predictions”. Then, once that is done and not before, run the simulation and see what really happens. The idea is this is a chance for you to confront your current assumptions of how motion works with how it actually works. Then put that down in “Observations”. In comparing the two you can hopefully learn to correct any misconceptions you have. You get NO POINTS for doing it backwards. You lose NO POINTS for incorrect predictions. If you happen to have a correct understanding great, good for you; test it again and then move on to the next exercise. If your prediction was not accurate it’s a chance for you to examine your assumptions and correct your thinking. Work together if you can. It helps to have another mind to bounce your ideas off of.

*The location of the man above will be considered the origin

1. The man moves at constant speed from the tree to his house and stops at the front door to look for his keys. Draw the Position vs. Time graph that describes this motion.

Predictions

Observations

2. Draw the Velocity vs. Time graph for the motion described in question 1. Would you expect the graphs to look the same? Explain your reasoning.

Predictions

Observations

3. A man leaves his house and walks casually to the tree when he hears his son calling for him. He starts walking back home but as the screams get louder and louder he runs faster and faster. Draw the Position vs. Time graph.

Predictions

Observations

4. Draw the Velocity vs. Time graph for the situation in question 3.

Predictions

Observations

5. Circle the correct answer – then check your answers with the simulations. If the velocity is positive, the man is moving to the right / lef

If the velocity is negative, the man is moving to the right / lef

If the velocity is positive, and the acceleration is positive, the man is speeding up / slowing down

If the velocity is positive, and the acceleration is negative, the man is speeding up / slowing down

If the velocity is negative, and the acceleration is positive, the man is speeding up / slowing down

If the velocity is negative, and the acceleration is negative, the man is speeding up / slowing down

Generalize your observation. When is the man slowing down? When is he speeding up? What are the conditions or relative features of velocity and acceleration in each case?...