# Lab 2 report.docx - Deedee Ozoh PHYS 1410L SECTION 805...

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Deedee Ozoh PHYS. 1410L SECTION 805 Instructor: Alvin Kow Date Performed: February 13 th 2018. Partner: Margo Dubarry and Zazzy Forsyth MOTION IN FREE-FALL Objective: The goal of this experiment was to examine the motion of a body falling freely and determine the acceleration due to gravity from the measured rate at which the velocity changes.
Introduction A body that is allowed to fall freely is acted upon by the gravitational force between the body and the earth and is directed toward the center of the earth. If the distance of the fall is a lot less than the earth’s radius, then this gravitational force is constant in magnitude and the acceleration due to gravity (g) will be constant during the time of fall. The force due to air resistance which also acts on a falling body is ignored. However, the air resistance for smooth, dense bodies falling only a short distance is very small, and its effect is ignored in this experiment. For a body moving with constant acceleration: a= v-v o t or v=v o +at where a represents acceleration, v o represents the initial value, v represents the final value, and t is the time interval. A plot of v-vs-t should be a straight line if acceleration is constant, and the slope of this line is equal to a. The average velocity of a body is defined as the total displacement (s) travelled by the body divided by the time taken to travel that displacement. i.e v= s/t For uniformly accelerated motion, the average velocity is v= v o +v t