Bungee Cord Escape. You are running from pirates on a tropical island somewhere in the Caribbean. You had somehow become separated from the rest of your group and now find yourself on the edge of cliff with your pursuers less than 10 minutes behind you. According to a sign posted on the guardrail at the cliff's edge, the drop to the beach below is h = 145 ft. Your team members (waiting for you on the beach, near your boat) have a rope, but there is no time for anyone to climb the cliff to save you. You break into a deserted cabin nearby, and rummage around for a rope. Instead, you find a brand new, still-in-package, bungee cord that must have been intended for tourists jumping from a nearby bridge. You figure you might be able to attach it to the guardrail and jump to the beach, letting go at the bottom before it reverses your motion. You read the bungee cord specifications on the package: the total length of the cord is Lo = 100 ft, the maximum elastic deformation is 200% (i.e., it can safely triple its length), and the elastic constant is k = 80.0 N/m. (a) If you weigh 165 lb, how far is the bungee cord designed to let you fall before it stops you and reverses your direction? Will this afford you a safe landing? (b) You realize that you don't have to hang from the very end of the bungee, but rather from some point in the middle. From where should you grasp the bungee cord so that you land softly on the beach? (Determine at what distance from the end of the cord the point of grasp is to be.) Will you be able to perform the jump and stay under the elastic deformation limit? (a) Number i (b) Number ◆ Units Units ✪ ✪ ✪
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images