Notes from 12/9 Kathia. a c : the acceleration of an object moving in a uniform circular path (constant speed / radius) is due to a change in direction.

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Presentation transcript:

Notes from 12/9 Kathia

a c : the acceleration of an object moving in a uniform circular path (constant speed / radius) is due to a change in direction. Centripetal acceleration is always directed toward the center of a circle. Centripetal Acceleration Given in Eqtn sheet

Calculating Centripetal Acceleration

Example1 A 1.5kg ball moves in a circle that is 3m in radius at a speed of 9.8m/s. Calculate its centripetal acceleration.

Example2 What is the Centripetal acceleration of a person standing at the Earth's equator (r = 6.38x10 6 m)?

Calculating Tangential Speed

Example3 A physics student riding in a sports car noticed the fuzzy dice in his friend’s car to make a 45 degree angle with the vertical. Find the tangential speed of the car if the car is making a turn on a road that follows a curve with a 50m radius.

Calculating Radius of uniform circular motion.

Example4 A quarter placed on a turntable has a centripetal acceleration of 2.0m/s/s and a tangential speed of 0.57m/s. How far is the quarter from the center of the turntable?