Posted by adan on Thursday, April 26, 2012 at 4:13pm.
an airplane propeller slows from an initial angular speed of 12.5rev/s to a final angular speed of 5rev/s during the process the propeller rotates through 21 rev. find the angular acceleration of the propeller if in radians per second squared, assuming its constant?

physics  Anonymous, Thursday, April 26, 2012 at 4:15pm
A 38.0kg crate rests on a horizontal floor, and a 72.8kg person is standing on the crate. Determine the magnitude of the normal force that (a) the floor exerts on the crate and (b) the crate exerts on the person.