Suppose you are whirling the ball at the end of the string with an angular velocity of rad. s Then you decide to speed up the motion. It takes you 3 seconds to make the ball reach an angular speed of rad. s. The rotational acceleration of the ball is 3n

A golfer is hitting a shot, the angular velocity of her club is zero at the top of the backswing and 30 rad/s at the bottom of the downswing just before impact with the ball. If the downswing lasts 0.30 s, what is the average angular acceleration of the club during the downswing? A. 100 rad/s^2 B. 10 rad/s^2 C. 100 deg/s^2 D. 30 rad/s^2  pick one answer only this is for biomechanics

A child with mass 42 kg sits on the edge of a merry-go-round at a distance of 3.0 m from its axis of rotation. The merry-go-round accelerates from rest up to 0.40 rev/s in 10 s. a. What is the angular acceleration of the merry-go-round? Express this in radians/second. b. What is the angular velocity at 5 s? c. Calculate the centripetal acceleration and tangential acceleration at 5 s. d. What is the total acceleration at 5 s? e. If the coefficient of static friction between the child and the surface of the merry-go-round is 0.6, does the child fall off before 5 s? Hint: To determine this, calculate the frictional force and force due to the acceleration of the merry-go-round on the child. Compare the two forces to find which is larger than the other, therefore overcomes the other.

During a very quick stop, a car deceleraes at 7.00 m/s^2.a. What is the angular acceleration of its 0.280-m-radius tires, assuming they do not slip on the pavement?b. How many revolutions do the tires make before coming to rest, given their initial angular velocity is 95.0 rad/s?c. How long does the car take to stop completely?d. What distance does the car travel in this time?e. What was the car’s initial velocity?f. Do the values obtained seem reasonable, considering that this stop happens very quickly?

A flywheel slows from 662 to 400 rev/min while rotating through 38 revolutions. a. What is the (constant) angular acceleration of the flywheel? rad/s2 b. How much time elapses during the 38 revolutions? t S a

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What is the angular speed in radians per second (rad/s) of the hour hand on an analog clock? A. 1.5 x 10-4 rad/s B. 1.7 x 10-3 rad/s C. 0.20 rad/s D. 0.052 rad/s D O C О А OB

Up Left Right Down A spinning disk is rotating at a rate of 5 rad/s in the positive counterclock-wise direction. If the disk is subjected to an angular acceleration in the counterclock-wise direction at a rate of 4 rad/s², Find the wheel's angular velocity in rad/s after 4 s. ere i 11 rad/s. -16 rad/s. -11 rad/s. enceO 21 rad/s. O -21 rad/s. men

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Kacey is learning how to figure skate. She is spinning with her arms out, each arm is .5 m, with an angular velocity of 2 rad/s. Her teacher tells her to pull in her arms for a total radius of 0.15 m. What is her angular velocity?