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Unformatted text preview: Review Notes For Exam I SAR Physics Andrew M Kolchin I. Pendulum - Qualitative study to introduce us to the concepts of pulling, position, speed, and acceleration. Here is where we first made the connection that pulling causes accel- eration . 1. Motion of the ball: A ball of mass ( m ), suspended on a string of length ( L ) is initially released from rest at an angle of deflection from the vertical ( θ ). The other end of the string is connected to a pivot . • Downswing 1 : The ball begins to move, increasing in speed as it approaches the bottom of its swing. • The ball is moving fastest at the bottom of its swing . • Upswing 1 : The ball moves slower as it approaches its maximum height on the side opposite to which it started. • Turning Point 1 : The ball stops at its maximum height and reverses direction. • Downswing 2 : The ball heads back the way it came increasing in speed. • The ball is moving fastest at the bottom of its swing . • Upswing 2 : The ball, slowing down, returns to- wards its starting point. 1 • Turning Point 2 : The ball reaches its maximum height at its original starting point, stops, and re- verses direction. • The time the ball takes to complete the above roundtrip is called the period of the pendulum . The ball now starts its next roundtrip, and this process would go on forever if there were no friction. 2. Pulling on the ball • The string is always pulling the ball towards the pivot . • Gravity is always pulling the ball downwards ....
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