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Uniform Circular Motion GIZMO

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Student Exploration: Uniform Circular Motion Vocabulary: acceleration, centripetal acceleration, centripetal force, Newton’s first law, Newton’s second law, uniform circular motion, vector, velo ... city Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. A boy is whirling a yo-yo above his head in a counterclockwise direction. At the exact moment shown at left, he lets go of the string. In which direction will the yo-yo travel? Draw an arrow on the image to show the yo-yo’s direction. counterclockwise 2. Do you think the released yo-yo’s path will be straight or curved? Explain. Curved, due to the centripetal force Gizmo Warm-up The Uniform Circular Motion Gizmo™ shows a pink puck that is floating above a circular air table. The puck is held to the center of the table by a string so that it travels in a circle at a constant speed. Check that the radius is 8.0 m and the mass is 5.0 kg. Set the velocity to 5.0 m/s. 1. Turn on Show puck position (m). What are the coordinates of the puck’s position? (8,0) 2. Click Play ( ), and then click Pause ( ) when the puck is close to the y-axis. What is the puck’s position now? (0,8) 3. Click Reset ( ). Select the BAR CHART tab and select Velocity from the dropdown menu. The three bars represent the magnitude, the x component, and the y component of the puck’s velocity. A. Click Play. Does the magnitude of the velocity change over time? The Magnitude doesn’t change but the x and y component does. B. Do the x and y components of the velocity change over time? Yes [Show More]

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