qz7sol_3885f10 - = 4 rev (2 rad/1 rev) = 8 rad One of the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
TA: Tomoyuki Nakayama Monday, October 18, 2010 PHY 2048: Physic 1, Discussion Section 3885 Quiz 7 (Homework Set #8) Name: UFID: Formula sheets are not allowed. Calculators are allowed. Do not store equations in your calculator. You need to show all of your work for full credit. ________________________________________________________________________________ A merry-go-round rotates from rest with an angular acceleration of 1.80 rad/s 2 . a) How long does it take to rotate through the first 4.00 rev? First we express the angular displacement of the merry-go-round in radians.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: = 4 rev (2 rad/1 rev) = 8 rad One of the kinematics equations yields = (1/2) t 2 t = (2 / ) = 5.28 s b) How long does it take to rotate through the next 4.00 rev? We calculate the time interval for the merry-go-round to rotate the first 8 rev. = 8 rev (2 rad/1 rev) = 16 rad = (1/2) t 2 t = (2 / ) = 7.47 s From a), we know it takes 5.28 s to rotate the first 4 rev. The time it takes to rotate the second 4 rev is 7.47 5.28 = 2.19 s...
View Full Document

Ask a homework question - tutors are online