A1.60 m tall person lifts a 2.10-kg book from the ground so it is 2.20 m above the ground. what is the potential energy of the book relative to (a) the ground and (b) the top of the person’s head? how is the work done by the person related to the answers in parts (a) and (b)?

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.

What would people living along the coast in south florida do if there was a hurricane warning? move to locations away from the water flock along coasts to watch the natural phenomenon buy instruments to predict the exact location of the hurricane measure water levels to know the exact time of the hurricane

2. circled insects have mutations, or changes to their dna. how many of the offspring insects in this generation have mutations?