Arigid, uniform bar with mass m and length b rotates about the axis passing through the midpoint of the bar perpendicular to the bar. the linear speed of the end points of the bar is v. what is the magnitude of the angular momentum l of the bar?

Ashley recently opened a store that sells only natural ingredients. she wants to advertise her products by distributing bags of samples in her neighborhood. it takes one person 22 minutes to prepare one bag. how many hours will it take to prepare 900900 bags of samples if ashley and 55 of her friends do the work?