D Grade 4/5/2018 06:00 PM 4 143/100 4/5/2018 02:11 PM Print CakuiatorPeriodic Ta
ID: 2036451 • Letter: D
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D Grade 4/5/2018 06:00 PM 4 143/100 4/5/2018 02:11 PM Print CakuiatorPeriodic Table Question 4 of 7 IncormectIncorrect Map de Sapling Learning Rank the angular speed of the following objects, from highest to lowest: -A bowling ball of radius 12.1 cm rotating at 0.456 radians per second. A tire of radius 0.381 m rotating at 12.2 rpm. - A 6.09 cm diameter top spinning at 18.7 degrees per second. - A square, with sides 0.123 m long, whose comers are moving with tangential speed 0.287 m/s as it rotates about its center. -A rock on a string, being swung in a circle of radius 0.587 m with a centripetal acceleration of 4.53 m/s Highest Angular Speed Rock Square Tire Bowling Bal Top There is a hint available! Speed View the hint by dicking on the bottom dividee bar dvider bar again to hide the hint O Previcus Give Up& View Solution Check Answer NextExplanation / Answer
Bowling ball
w = 0.456 rad/sec
tire
w = 12 rpm = 12*2*pi/60 = 1.257 rad/sec
top
w = 18.7 deg/sec = 0.3263 rad/sec
1 deg = 0.01745 rad
square
V = w*r
w = V/r
r = a/sqrt 2 = 0.123/sqrt 2 = 0.0870
w = 0.287/0.087 = 3.298 rad/sec
rock
ac = v^2/r = w^2*r
w = sqrt (ac/r) = sqrt (4.53/0.587) = 2.78 rad/sec
Order
square > rock > tire > bowling ball > top
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