Two people start at the same place and walk around a circular lake in opposite directions. One has an angular speed of 2.05 x 10-³ rad/s, while the other has an angular speed of 3.78 x 10-3 rad/s. How long will it be before they meet? Number i Start Units 01 End

18.) A grinding wheel 0.40 m in diameter rotates at 2200 rpm . a.) Calculate its angular velocity in rad/s. Express your answer using three significant figures. w=_______________rad/s   b.) What is the linear speed of a point on the edge of the grinding wheel? Express your answer to two significant figures and include the appropriate units. v= ______________ ______________   c.) What is the acceleration of a point on the edge of the grinding wheel? Express your answer to two significant figures and include the appropriate units. aR=______________ _____________

Macmillan Learning Your computer has an optical disk drive that can spin up to 10,000 rpm (which is about 1045 rad/s). If a certain disk is spun at 352.9 rad/s during the time it is being read, and then comes to rest over 0.569 seconds, what is the magnitude of the average angular acceleration of the disk? average angular acceleration: If the disk is 0.12 m in diameter, what is the magnitude of the linear acceleration of a point 1/3 of the way out from the center of the disk? linear acceleration: x10 rad/s² TOOLS m/s²

The counterclockwise wheel is rounded at the x, y level if the angular velocity decreases with time. What is the direction of a, w, respectively? Choose and solve steps: a) -z ,+z  b) +z, +z c) +z ,-z  d) -z ,-z