41. (II) Chris jumps off a bridge with a bungee cord (a heavy stretchable cord) tied around his ankle, Fig. 6–42. He falls for 15 m before the bungee cord begins to stretch. Chris's mass is 75 kg and we assume the cord obeys Hooke's law, F = -kx, with k = 55 N/m. If we neglect air resistance, estimate what distance d below the bridge Chris's foot will be before coming to a stop. Ignore the mass of the cord (not realistic, however) and treat Chris as a particle. (b) (c) 15 m FIGURE 6-42 d Problem 41. (a) Bungee jumper about to jump. (b) Bungee cord at its unstretched length. (c) Maximum stretch Ay = ? y= 0 of cord.

41. (II) Chris jumps off a bridge with a bungee cord (a heavy stretchable cord) tied around his ankle, Fig. 6–42. He falls for 15 m before the bungee cord begins to stretch. Chris's mass is 75 kg and we assume the cord obeys Hooke's law, F = -kx, with k = 55 N/m. If we neglect air resistance, estimate what distance d below the bridge Chris's foot will be before coming to a stop. Ignore the mass of the cord (not realistic, however) and treat Chris as a particle. (b) (c) 15 m FIGURE 6-42 d Problem 41. (a) Bungee jumper about to jump. (b) Bungee cord at its unstretched length. (c) Maximum stretch Ay = ? y= 0 of cord.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

9. What force will be needed to move the block of wood having a mass of 0.6 kg up the inclined plane (0 = 30) so that it will attain a velocity of 1.5 m/s after 3 seconds? (uk = 0.15)
(3) 3rd signi. pls
35. A 2.0-kg purse is dropped from the top of the Leaning Tower of Pisa and falls 55 m before reaching the ground with a speed of 27 m/s. What was the average force of air resistance?
20. A 1,300 kg car accelerates uniformly from rest to 60km/h over a distance of 40 m. How much force is being applied by the engine to do this ?.
5. How much time does it take for a rock dropped from a cliff to fall 180 meters? Assume no air drag. (2)
direction of the resulting velocity :>
10. A man pulls a box from rest with a horizontal force F across a frictionless surface a distance d. (a) If he were to repeat this process by pulling the rope at an angle of 20° above the horizontal, the final velocity of the box increases decreases stays the same Justify your answer.
A car accelerates from a stop to 100km/h in 4 seconds. - what is its acceleration? - what if it went from 100km/h to a stop in 5 seconds, what would be its acceleration? - suppose the car has a mass of 1200kg. How strong is the force on the car?
1) If a force of 35 N acts on a spring with a spring constant of 192 N/m, how far does the spring stretch in millimeters?
#5
4. Calculate: (1)A net force of 450 N accelerates a bike and rider at 3.5 m/s², what is the mass of the bike and rider? (2)What is the weight of a 75-kg astronaut on earth? (3)Superman must stop a 120Km/h train in 250m to keep it from hitting a stalled car on the tracks. If the train's mass is 4.8×10ʻkg, how much force must he exert? Compare to the weight of the train.
Suppose a car accelerates from 69 to 112 km/h? By what percent does the drag force on a car increase?