Lab Forces Motion - lab PDF

Preview

Summary

lab...

Description

Lab – Forces and Motion Directions: Download, and read these instructions. Please use this sheet for you answers. You will work on it alone or in a group. Answer all predictions first and then go to the following simulation: http://phet.colorado.edu/en/simulation/forces-and-motion Use a ruler to make sure that the forces are approximately to scale. 1. Sketch the FBD of a man pushing a box along a horizontal floor if the box is not moving.

Predictions

Observations

2. Now a woman is pushing the box from question 1 with a constant acceleration. Sketch the FBD. How is this different from question 1? Explain.

Predictions

Observations

3. Now imagine that you are pushing the box. You start off by applying a small force and gradually increase the force until the box starts to move. The box keeps moving with constant acceleration. Draw force vs. time graph including: 1. Force by you on the box; 2. Force by surface on the box (also known as friction); 3. Total net force acting on the box.

Predictions

Observations

4. Imagine 4 different objects with the same coefficient of static friction µ s. Use the system to set and test these 4 masses. Rank in order from smallest to largest: the minimum applied force required to make the objects move if their masses are: Object 1 = m/2

Predictions

Object 2 = m

Object 3 = 2m

Object 4 = 4m

Observations (The “force graphs” tab is the best place for these observations )

5. Now imagine that the objects in the question above are pushed with a force F for 4 seconds each. Rank, from smallest to greatest, the final velocity of the objects. Explain.

Predictions

Observations...