Question 1 of10 > -/1 E View Policies Current Attempt in Progress A rotating object has an angular acceleration of a = 0 rad/52. Which one or more of the following three statements is consistent with a zero angular acceleration? A. The angular velocity is a) = O rad/s at all times. B. The angular velocity is w = 10 rad/s at all times. C. The angular displacement 9 has the same value at all times. O A and B, but not C O C only O A, B, and C O B only O Aonly Question 2 of 10 - /1 WIN - . . . View Policies Current Attempt in Progress You are in a tall building located near the equator. As you ride an elevator from the ground floor to the top floor, your tangential speed due to the earth's rotation O does not change O decreases O increases when the speed of the elevator increases and decreases when the speed of the elevator decreases O increasesQuestion 3 of 10 - /1 E View Policies Current Attempt in Progress A pitcher throws a curveball that reaches the catcher in 0.59 s. The ball curves because it is spinning at an average angular velocity of 360 rev/min (assumed constant) on its way to the catcher's mitt. What is the angular displacement of the baseball (in radians) as it travels from the pitcher to the catcher? Number n Units v Question4of10 -/1 '5 View Policies Current Attempt in Progress Two people start at the same place and walk around a circular lake in opposite directions. One has an angular speed of 2.54 x 10'3 rad/s, while the other has an angular speed of 7.57 x 10'3 rad/s. How long will it be before they meet? Number I Units v Question 5 of 10 - I1 E View Policies Current Attempt in Progress An automatic dryer spins wet clothes at an angular speed of 4.2 rad/s. Starting from rest, the dryer reaches its operating speed with an average angular acceleration of 3.2 rad/52. How long does it take the dryer to come up to speed? a V Question 6 of 10 /1 E View Policies Current Attempt in Progress A person is riding a bicycle, and its wheels have an angular velocity of 18.7 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 16.2 revolutions. (a) How much time does it take for the bike to come to rest? (b) What is the anguar acceleration (in rad/52) of each wheel? (a) Number l Units V (b) Number n Units V Precious question 7 0f 10 ' / 1 55 View Policies Current Attempt in Progress Afan blade is rotating with a constant angular acceleration of +132 rad/52. At what point on the blade, as measured from the axis of rotation, does the magnitude of the tangential acceleration equal that of the acceleration due to gravity? r: a V Question 8 of 10 I1 E View Policies Current Attempt in Progress A planet orbits a star, in a year of length 2.46 x 107 s, in a nearly circular orbit of radius 1.30 x 1011 m. With respect to the star, determine (a) the angular speed of the planet, (b) the tangential speed of the planet, and (c) the magnitude of the planet's centripetal acceleration. (a) Number I Units V (b) Number Units v (c) Number l Units V Question 9 of 10 /1 E View Policies Current Attempt in Progress A star has a mass of 1.27 x 1030 kg and is moving in a circular orbit about the center of its galaxy. The radius of the orbit is 3.0 x 104 light-years(1|ight-year = 9.5 x 1015 m), and the angular speed of the star is 1.5 x 10'15 rad/s. (a) Determine the tangential speed ofthe star. (b) What is the magnitude of the net force that acts on the star to keep it moving around the center of the galaxy? (a) Number Units V (b) Number n Units v Question 10 of 10