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Unformatted text preview: Activity 5 PS-2826 Physics with the Xplorer GLX © 2006 PASCO p. 25 Acceleration Due to Gravity Kinematics: linear motion, acceleration, free fall, graphing GLX setup file: free fall Qty Equipment and Materials Part Number 1 PASPORT Xplorer GLX PS-2002 1 PASPORT Motion Sensor PS-2103 1 Large Base and Support Rod ME-9355 1 Rod, 45 cm ME-8736 1 Double Rod Clamp ME-9873 1 Tape Measure, 1.5 m PM-8761 1 Ball, rubber Purpose The purpose of this activity is to measure the acceleration due to gravity of a falling object. Background Over twenty-two centuries ago, a Greek philosopher and scientist named Aristotle proposed that there is a natural force that causes heavy objects to fall toward the center of Earth. He called this force “gravity”. In the seventeenth century, the English scientist Isaac Newton was able to show that gravity is a universal force that extends beyond Earth. It is the force that causes the moon to orbit the Earth and the Earth to orbit the Sun. When an object is in “free fall”, the only force acting on it is the force of gravity. As an object falls freely, it accelerates. For a falling object near the surface of Earth, the rate of change of velocity is a constant value. This value is the acceleration due to gravity. If you ignore air resistance, a falling ball accelerates as if it is in free fall. You can measure the motion of the falling ball to find the value of the acceleration due to gravity. Safety Precautions • Follow all directions for using the equipment. Preview Use the Motion Sensor to measure the motion of a ball as it falls and bounces. Use the Xplorer GLX to record the motion and display and analyze the position and velocity of the ball. Use the velocity versus time graph to find the acceleration of the ball. Activity 5 Acceleration Due to Gravity–Freely Falling Ball PS-2826 Physics with the Xplorer GLX © 2006 PASCO p. 26 About the Motion Sensor The Motion Sensor sends out pulses of ultrasound and picks up the echoes of ultrasound that bounce back from objects in front of it....
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- Spring '09