Posted by Hannah on Saturday, June 9, 2012 at 4:24pm.
Some bacteria are propelled by motors that spin hairlike flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.9x108m, and a tangential speed at the rim of 2.7x105 m/s. (a) What is the angular speed (the magnitude of the angular velocity) of this bacterial motor? (b) How long does it take the motor to make one revolution?
I do not know how to start this. Thank you!
v=ù•R, => ù=v/R,
T=2ð/ù
So is v 1.9e^8?? I do not know what r is.

Physics(Please help)  Elena, Sunday, June 10, 2012 at 10:13am
angular speed ω.
linear speed v.
v=ω•R, => ω=v/R,
R=1.9x108 m,
v=2.7x105 m/s.
Time for 1 rev = period T,
T=2π/ω
Answer This Question
Related Questions
 Physics(Please respond)  Some bacteria are propelled by motors that spin hair...
 Physics  Some bacteria are propelled by motors that spin hairlike flagella. A ...
 physics  Some bacteria are propelled by biological motors that spin hairlike ...
 College Physics  Some bacteria are propelled by motors that spin hairlike ...
 Radians  The angular speed of a large pulley wheel that has a radius of 15, is ...
 Physics  A uniform disk with mass 6 kg and radius 1.8 m is pivoted at its ...
 physics  The flywheel of a steam engine runs with a constant angular speed of ...
 physics  A disk with mass m = 8.1 kg and radius R = 0.33 m begins at rest and ...
 physics  (a) What is the tangential acceleration of a bug on the rim of a 6.0 ...
 physics  A car is up on a hydraulic at a garage. The wheels are free to rotate...
More Related Questions