# Physics Motion Lab

**Topics:**Acceleration, Velocity, Classical mechanics

**Pages:**4 (859 words)

**Published:**January 16, 2012

Introduction

To graphically analyze motion, two graphs are commonly used: Displacement vs. Time and Velocity vs. Time. These two graphs provide significant information about motion including distance/displacement, speed/velocity, and acceleration. The displacement and acceleration of a moving body can be obtained from its Velocity vs. Time graph by respectively finding the area and the slope of the graph.

Data Tables – Part I

Displacement (m)Time (s)

0.10 m0.37 s

0.20 m0.586 s

0.30 m0.761 s

0.40 m0.907 s

0.50 m1.041 s

0.60 m1.147 s

0.70 m1.263 s

0.80 m1.351 s

0.90 m1.439 s

1.00 m1.597 s

1.10 m1.646 s

1.20 m1.779 s

1.30 m1.956 s

Part II

Main Photogate at __(m)Time (s)Instantaneous Velocity (m/s) 0.30 m0.098 s0.41 m/s

0.40 m0.072 s0.55 m/s

0.50 m0.06 s0.67 m/s

0.60 m0.053 s0.75 m/s

0.70 m 0.047 s0.85 m/s

0.80 m0.043 s0.93 m/s

0.90 m0.042 s0.95 m/s

1.00 m0.038 s1.05 m/s

1.10 m0.038 s1.05 m/s

1.20 m0.041 s0.98 m/s

1.30 m0.049 s0.82 m/s

1.40 m0.05 s0.8 m/s

1.50 m0.055 s0.72 m/s

Part III

Estimated area

Velocity vs. Time graph

From t=0s to t=0.8s

0.49 m

Slope @ T= 0.8 s

Displacement vs. Time

= 0.6 m/s

Velocity vs. Time

= 0.3 m/s2

(Work shown on graph paper)

Summary Questions

1)Describe the meaning of the slopes of the graphs you obtained in Part III. The slope of the Displacement vs. Time graph (0.6 m/s) represents the velocity of the moving cart at 0.8 seconds. The slope of the Velocity vs. Time graph (0.3 m/s2) represents the acceleration of the moving cart at 0.8 seconds.

2)Describe the motion of the cart based on your result from the Velocity vs. Time graph. Based on the Velocity vs. Time graph, the cart is decelerating because the slope decreases as time passes and the slope represents acceleration/deceleration in a Velocity vs. Time graph.

3)...

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