quarterback throws a pass that is a perfect spiral. In other words, the football does not wobble, but spins smoothly about an axis assing through each end of the ball. Suppose the ball spins at 8.3 rev/s. In addition, the ball is thrown with a linear speed of 14 m/s at n angle of 52° with respect to the ground. If the ball is caught at the same height at which it left the quarterback's hand, how many evolutions has the ball made while in the air? Number i Units

A “blink of an eye” is a time interval of about 150 ms for an average adult. The “closure” portion of the blink takes only about 55 ms. Let us model the closure of the upper eyelid as uniform angular acceleration through an angular displacement of 14.0°. What is the tangential acceleration of the edge of the eyelid while closing if the radius of the eyeball is 1.25 cm?

A 100 kg vehicle enters a flat circular turn of radius 5 m. It is initially traveling at 5 m/s counterclockwise. During the first 1/8 of a revolution The car speeds up at a rate of .0159 rad/s^2 a. Find the angular and tangential velocity after the 1/8 of a revolution b. Find centripetal and tangential acceleration after 1/8 of revolution c. Assuming the turn is not banked is it likely that the car could safely make this turn? d.

If a centrifuge has an inital angular velocity of 20 rotations per second and and a constant angular acceleration of 15 rad/s2 how fast is it rotating after 25 rotations in rotations per second.

Human centrifuges are used to train military pilots and astronauts in preparation for high-g maneuvers. A trained, fit person wearing a g-suit can withstand accelerations up to about 9g (88.2 m/s2) without losing consciousness. (A) If a human centrifuge has a radius of 4.29 m, what angular speed (in rad/s) results in a centripetal acceleration of 9g? rad/s ?   (B) What linear speed (in m/s) would a person in the centrifuge have at this acceleration? m/s

A young boy swings a yo-yo horizontally above his head so that the yo-yo has a cen- tripetal acceleration of 220 m/s². If the yo-yo's string is 0.26 m long, what is the yo-yo's tangential speed? Answer in units of m/s.

A ball of radius 0.200 m rolls with a constant linear speed of 2.47 m/s along a horizontal table. The ball rolls off the edge and falls a vertical distance of 2.20 m before hitting the floor. What is the angular displacement of the ball while the ball is in the air?

A pulley having a 5.0-cm radius is turning at 30 rev/s about its central axis. It is slowed down uniformly to 20 rev/s in 2.0 s. Calculate the angular acceleration of the pulley, the angle through which it turns in this time, the length of belt it winds in that same time.

I need help on this question: You are driving on a horizontal circular road of radius 50.0 m at a constant speed of 11.17 m/s. How much time does it take to complete 10 rounds?What is your angular velocity? When you are at the northern most point on the road, what is the magnitude and direction of your acceleration?

A wheel of a radius 5.02 m rotates at a uniform speed. If a point on the rim of the wheel has a centripetal acceleration of 4.00 m/s2, what is the point’s tangential speed?