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Unformatted text preview: speed is not changing d. because your speed is continously increasing and dec reasing as your direction changes PHYS115 ‐ Spring 2013 V/d 1c 2a 3d 4c 5b 6d 7a 8c 9c 10a 1 Test 1 ‐ 4 March 2013 angle between two spokes is 360/5 = 72 degrees this is 72 / 360 * 2 pi = 1.3 rad (or just 2*pi/5 = 1.3 rad ) 2 rot/ 4 s = 2 *2 pi / 4 = pi = 3.142 rad/s time from ½ g t2 = height so time = sqrt(2 x height /g ) = 3.194 sec. In this time speed grows to g x time = 31 m/s See below: Imagine you suspend the boomerang; only the second diagram makes sence it has the greatest vertical speed hing
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