An electric motor rotating a workshop grinding wheel at a rate of 1.17 x 102 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.70 rad/s². (a) How long does it take for the grinding wheel to stop? (b) Through how many radians has the wheel turned during the interval found in (a)? rad

A 37.2-cm diameter disk rotates with a constant angular acceleration of 2.3 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. (a) Find the angular speed of the wheel at t = 2.30 s. rad/s(b) Find the linear velocity and tangential acceleration of P at t = 2.30 s. linear velocity  m/s tangential acceleration  m/s2 c) Find the position of P (in degrees, with respect to the positive x-axis) at t = 2.30s. °

If the magnitudes of the velocity and acceleration of point A of the rotating bar are VA - 3 m/s and aA = 27 m/s2, what is the magnitude of the angular velocity co?a=0.58 m, b=0.14 m, and c=0.81 m. B b 0), a

The propeller of a World War II fighter plane is 2.50 m in diameter. (a) What is its angular velocity in radians per second if it spins at 1100 rev / min? Enter to 3 significant figures W (b) What is the linear speed of its tip at this angular velocity if the plane is stationary on the tarmac? Enter to 3 significant figures V= rad/s (c) What is the centripetal acceleration of the propeller tip under these conditions? Calculate it in meters per second squared Enter to 3 significant figures ac g m/s ac = ✔m/s² Compare the centripetal acceleration to the acceleration due to gravity g. Is the centripetal acceleration very large or very small compared to g? Enter to 3 significant figures = ✓ (d) State what force provided this centripetal acceleration.

A grinding wheel attached to an electric motor is initially rotating at 116 rev/min when it is suddenly switched off and comes to rest. Assume the wheel undergoes a uniform angular acceleration – 1.98 rad/s?. Through how many radians does the wheel turn in coming to a stop? {Note you'll have to convert rev and time units} O 28.5 rad O 55.6 rad O 37.3 rad O 43.1 rad O 14.7 rad MacBook Air 80 888 DII esc F3 F7 # $ % & 3 4 7 8 W R Y A D F G H J K C V

An automobile engine slows down from 4000 rpmrpm to 1400 rpmrpm in 2.7 ss . Calculate its angular acceleration, assumed constant. Calculate the total number of revolutions the engine makes in this time.

A 42.0-cm diameter disk rotates with a constant angular acceleration of 3.00 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. (a) At t = 2.32 s, find the angular speed of the wheel. rad/s (b) At t = 2.32 s, find the magnitude of the linear velocity and tangential acceleration of P. linear velocity             m/s tangential acceleration             m/s2 (c) At t = 2.32 s, find the position of P (in degrees, with respect to the positive x-axis). _________° counterclockwise from the +x-axis