Lab Report

Practice Objective

The objective in our Lab practice was to obtain from analytical methods, experimental data and graphical methods, the relationship between mass and acceleration of a body acting on it a constant force.

Introduction

Mass and acceleration are inversely proportional, theres were we apply Newton's second law, the formula is F=ma so if the net force is constant as the mass increases, the acceleration decreases and viceversa.

What Newton´s Second Law of Motion states is that the net force on an object is equal to the rate of change

Materials

o 1 Linear Air Track System

o 1 Air Pump

o 1 Pulley and Pulley Mounting Clamp

o 1 Ruler

o 1 Glider with holder with timer flag

o 1 Mass Hanger

o Set of Masses to pull the Glider

o Thread

o Digital Stop Watch

o Photogates

Procedure

1. Set up the air track and verify the level.

2. Mount and the pulley is centered relative to the hole of equipment, attach 5-40gr mass.

3. Set up the photogates over metallic ruler and connect them to the digital stop watch, one connected to button “ON” and the second to button “End”.

4. Distance between photogates should be 80cm to 100cm. Turn on the digital chronometer, selecting the scale of time and placing the glider with timing flag on photogate connected to the button “ON” until the stop watch is stopped (zeros).

5. Hold the glider, turn on the air pump and verify the stop watch display reads zeros. Release the glider and starts stop watch, when the timing flag glider passes in front of the second photogate, stop watch is stopped.

6. Measure the glider mass, mass hanger and masses. The experiment is repeated two more times in order to obtain an average time.

7. Repeat the experiment six more times with different masses placed on the top of the glider keeping at constant force that procedure the motion for all records.

Observations

Mass Displacement Time Time² Acceleration Force

5 40 1.283 1.646 48.600 243.00

10 40 0.970 0.941 85.025 850.25

15 40 0.810 0.656 121.933 1828.99

20 40 0.730 0.533 150.122 3002.44

25 40 0.670 0.449 178.213 4455.34

30 40 0.620 0.384 208.117 6243.50

35 40 0.580 0.336 237.812 8323.42

40 40 0.533 0.284 281.602 11264.08

Data Unit

Mass Grams

Displacement Centimeters

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