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 0 answersPost by Salman Khan on September 30, 2015I was wondering how will I ever understand the derivation of the formulas. Thank you! 0 answersPost by Jamal Tischler on October 8, 2014I apreciate you proved the formulas ! It helped me.

### Motion in Two Dimensions, Part 2: Circular Dimension

• If an object moves with constant speed along a circle, it will experience a centripetal force, directed toward the center of the circle.
• In the example of the Earth rotating around the sun, we can calculate the speed of the Earth from our knowledge of the distance between the earth and the sun, and that the period of rotation is one year.
• If the speed of an object, moving in a circular path, changes with time, then in addition to the centripetal acceleration there is also tangential acceleration. The net acceleration is the vector sum of the centripetal and tangential accelerations.

### Motion in Two Dimensions, Part 2: Circular Dimension

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

• Intro 0:00
• Uniform Circular Motion 0:15
• Object Moving in a Circle at Constant Speed
• Calculation Acceleration
• Change in Velocity
• Magnitude of Acceleration
• Centripetal Acceleration
• Example: Earth Rotating Around The Sun 18:42
• Center of the Earth
• Distance Travelled in Making One Revolution
• Acceleration of the Revolution
• Tangential Acceleration and Radial Acceleration 25:35
• If Magnitude and Direction Change During Travel
• Tangential Acceleration
• Example: Car on a Curved Road 29:50
• Finding Total Acceleration at Time T if Car is at Rest
• Extra Example 1: Centripetal Acceleration on Earth
• Extra Example 2: Pendulum Acceleration
• Extra Example 3: Radius of Curvature