Author Question: A wheel rotates about a fixed axis with an initial angular velocity of 20 rad/s. During a 5.0-s ... (Read 782 times)

deesands · **on:** Jul 28, 2018

A wheel rotates about a fixed axis with an initial angular velocity of 20 rad/s. During a 5.0-s interval the angular velocity decreases to 10 rad/s. Assume that the angular acceleration is constant during the 5.0-s interval. How many radians does the wheel turn through during the 5.0-s interval?
a. 95 rad
b. 85 rad
c. 65 rad
d. 75 rad
e. 125 rad

Question 2

A wheel rotates about a fixed axis with an initial angular velocity of 20 rad/s. During a 5.0-s interval the angular velocity increases to 40 rad/s. Assume that the angular acceleration was constant during the 5.0-s interval. How many revolutions does the wheel turn through during the 5.0-s interval?
a. 20 rev
b. 24 rev
c. 32 rev
d. 28 rev
e. 39 rev