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#DETERMINING THE ACCELERATION DUE TO GRAVITY LAB HOW TO#
#DETERMINING THE ACCELERATION DUE TO GRAVITY LAB MANUAL#
#DETERMINING THE ACCELERATION DUE TO GRAVITY LAB SOFTWARE#
#DETERMINING THE ACCELERATION DUE TO GRAVITY LAB SERIES#

One of the chief values of real-time data-logging, exemplified here, is the interaction between the collection and simultaneous display of results.

A straight line is the usual result, showing that the velocity squared is proportional to the height fallen.

Use the program to calculate a new column of data representing the square of the velocity.

This is usually of the form 'velocity is proportional to the square root of height'. (Y axis: velocity X axis: height fallen.) Use a curve matching tool to identify the algebraic form of the relationship.

The relationship between velocity and height fallen is more precisely investigated by plotting a XY graph of these two quantities.

Note the relative increase in values of velocity as greater heights are chosen.

Depending upon the software, the results may be displayed on a bar chart as the experiment proceeds.

#DETERMINING THE ACCELERATION DUE TO GRAVITY LAB SERIES#

Collect a series of measurements, each time increasing the height by 2 cm.

Repeat this procedure for a new starting height 2 cm above the first.

Repeat this measurement from the same height several times enter the height value in the height column of the table in the computer program. Release the card so that it cuts through the light beam a velocity measurement should appear in the table on the screen.

Hold the card above the light gate and next to the ruler so that its height above the gate may be measured carefully.

#DETERMINING THE ACCELERATION DUE TO GRAVITY LAB MANUAL#

This should also include a column for the manual entry of distance measurements taken from the ruler. A series of results is accumulated in a table.

#DETERMINING THE ACCELERATION DUE TO GRAVITY LAB SOFTWARE#

Adding two small blobs of Blutack, at the lower corners, will improve the stability of the card as it falls.Ĭonfigure the data-logging software to measure the transit time and calculate the velocity as the card passes through the light gate. Measurements of the height fallen by the card should be made to this line rather than the lower or upper edge of the card. Draw a pencil line across the width of the card at exactly half its length. Clamp a ruler so that the vertical distance may be measured from above the level of the light gate.Ĭut black card to the precise length of 10.0 cm. Read our standard health & safety guidanceĬlamp the light gate about 20 cm above the bench. The emphasis of this datalogging experiment is on investigating the relationship between the velocity of the card and the distance it has fallen from rest. Thus you get the value of g in your lab setup.The acceleration of an object allowed to fall under the force of gravity is found by dropping a card vertically through a light gate. Then take an average value of the four g values found. So in this case for four data sets, you will get 4 values of g. Substitute each set of period (T) and length (L) from the test data table into the equation, and calculate g.

#DETERMINING THE ACCELERATION DUE TO GRAVITY LAB HOW TO#

Now for each of the 4 records, we have to calculate the value of g (acceleration due to gravity) Now see, how to calculate and what formula to use.

Table 1: Recording the following data for 4 sets of string length (1) Time for 10 oscillations & (2) Period (T) Calculating g (acceleration due to gravity) Record the data in the table below following the instructions in the section above.

Use appropriate formulae to find the period of the pendulum and the value of g (see below).

Repeat step 4, changing the length of the string to 0.6 m and then to 0.4 m.

Change the length of the string to 0.8 m, and then repeat step 3.

Note: Divide the time by 10 to calculate the period of the swings, where the period is the time needed by the pendulum for one complete swing.

Use a stopwatch to record the time for 10 complete oscillations. Move the mass so that the string makes an angle of about 5° with the vertical.Measure the effective length of the pendulum from the top of the string to the center of the mass bob.Set up the apparatus as shown in the diagram:.