Adaredevil plans to bungee-jump from a hot-air balloon 65 meters above a carnival midway. he will use a uniform elastic cord, tied to a harness around his body, to stop his fall at a point 10 meters above the ground. model his body as a particle and the cord as having negligible mass and obeying hooke's law. in a preliminary test, hanging at rest from a 5 meter length of the cord, the daredevil finds his body weight stretches the cord by 1.5 meters. he intends to drop from rest at the point where the top end of a longer section of the cord is attached to the stationary hot-air balloon. a) what lenght of cord should he use? b) what maximum acceleration will he experience?

Steelhead trout migrate up stream to spawn. occasionally they need to leap up small waterfalls to continue their journey. fortunately, steelhead are remarkable jumpers, capable of leaving the water at a speed of 8.0 m/s. a. what is the maximum height a steelhead trout can jump? b. leaving the water at 8.0 m/s, the trout lands on top of the water fall 1.8 m high. how long was it in the air?

What ia the energy of an object because of its potential and kinetic energies

You are the coordinator for a program that is going to take place at night in a rectangular amphitheater in the mountains. you will have no access to any electricity, but you must be able to illuminate the entire grounds. you know the intensity of the light from a lantern varies inversely as the square of the distance from the lantern. suppose the intensity is 90 when the distance is 5 m. a. write an equation to model the situation. b. solve for the constant of variation. c. write the equation to model the situation using the constant () of variation. d. you have been given lanterns with 40 light intensity. use your equation to solve for the distance from the lantern. e. you need to illuminate 225 km. how many meters do you need to light? f. how many lanterns will you need?