EF 152 lecture notes

# EF 152 lecture notes - Module 1, Lecture 1 Rotational...

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EF 152 Spring, 2009 Lecture 1-1 1 Module 1, Lecture 1 ± Rotational Motion ± Introduction to EF 152 A solid ball and a solid cylinder roll down a ramp. They both start from rest at the same time. Which gets to the bottom first? a. They get there at the same time b. The ball gets there first c. The cylinder gets there first d. Can’t tell without knowing the mass and radius of each EF 151 Answer: EF 152 Answer: EF 152 Spring, 2009 Lecture 1-1 2 Circular motion: Definitions r _________ [L] θ _______ (rad) ω ___________________ (rad/s) α ___________________ (rad/s 2 ) v _______________ (L/s) T ______________ (s) f ________________(rpm, Hz) EF 152 Spring, 2009 Lecture 1-1 3 Circular Motion: Direction Right – hand rule • Curl fingers of right-hand in direction of motion • Direction of thumb is axis of rotation X Y Z X Y Z EF 152 Spring, 2009 Lecture 1-1 4 Example: Computer Hard Drive Given: A computer hard drive spins at 7200 rpm. The read head is currently located at 3.0 cm from the

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## This note was uploaded on 04/07/2009 for the course EF 152 taught by Professor Ab during the Spring '08 term at University of Tennessee.

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EF 152 lecture notes - Module 1, Lecture 1 Rotational...

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