91Ó°ÊÓ

Describe a situation. For each problem, draw a motion diagram, a force identification diagram, and a freebody diagram. An elevator, suspended by a single cable, has just left the tenth floor and is speeding up as it descends toward the ground floor.

Describe a situation. For each problem, draw a motion diagram, a force identification diagram, and a freebody diagram. A rocket is being launched straight up. Air resistance is not negligible.

Describe a situation. For each problem, draw a motion diagram, a force identification diagram, and a freebody diagram. A jet plane is speeding down the runway during takeoff. Air resistance is not negligible.

Describe a situation. For each problem, draw a motion diagram, a force identification diagram, and a freebody diagram. You've slammed on the brakes and your car is skidding to a stop while going down a \(20^{\circ}\) hill.

Describe a situation. For each problem, draw a motion diagram, a force identification diagram, and a freebody diagram. A cave explorer is being lowered into a vertical shaft by a rope. He is slowing down as he nears the bottom.

Describe a situation. For each problem, draw a motion diagram, a force identification diagram, and a freebody diagram. A basketball player is getting ready to jump, pushing off the ground and accelerating upward.

Describe a situation. For each problem, draw a motion diagram, a force identification diagram, and a freebody diagram. A bale of hay sits on the bed of a trailer. The trailer is starting to accelerate forward, and the bale is slipping toward the back of the trailer.

Describe a situation. For each problem, draw a motion diagram, a force identification diagram, and a freebody diagram. In the process of nailing up a heavy framed poster, a student pushes the poster straight in toward the wall; the poster is sliding downward at a constant speed.

Describe a situation. For each problem, draw a motion diagram, a force identification diagram, and a freebody diagram. A spring-loaded gun shoots a plastic ball. The trigger has just been pulled and the ball is starting to move down the barrel. The barrel is horizontal.

Describe a situation. For each problem, draw a motion diagram, a force identification diagram, and a freebody diagram. A person on a bridge throws a rock straight down toward the water. The rock has just been released.