rotating from rest with a constant angular acceleration. It takes 2.5 seconds to complete ten revolutions. One complete revolution takes how long? What is the linear displacement of the rim after ten revolutions? Determine the angular acceleration of the disk in radians per second squared (rad/s^2).

Computation An electric grinder is spinning CCW at 30 rev/s when the power is turned off and the grinder slows at a steady rate, taking 83 s to stop rotating. How many revolutions did it make while slowing to a stop? [Tip: Be careful with units.] ΔΘ- Record your numerical answer below, assuming three significant figures. Remember to include a 11 11 1 as necessary. rev O Search

Please do the last three questions so 3, 4, and 5!    A 20kg child is spinning on a carousel (radius =1.5m) and accelerates to a speed of 2 m/s.  1. What is the angular velocity of the carousel? The child then jumps on 2. What is the force exerted by the child if he is hanging on the bar at the edge of the carousel? 3. Now, the child moves closer inside of the carousel and is 0.5m from the center. What is the new force of the child hanging onto the bar? What is the new force if he is 0.7m from the center? 4. After 2 minutes, the carousel slowed down at about 25%. What is the total angular displacement of the carousel during the 2 minute time (in radians)? 5. Now, the child moves back out to the edge (original position) and steps off, from 8 cm above the ground? What is the speed do they hit the ground with, and in which direction?

I NEED HELP WITH BOTH QUESTION