74, 75, 107 [Hint: Assumeit is stretched.]74. Jorge is going to bungee jump from a bridge that is55.0 m over the river below. The bungee cord has anunstretched length of 27.0 m. To be safe, the bungeecord should stop Jorge's fall when he is at least 2.00 mabove the river. If Jorge has a mass of 75.0 kg, whatis the minimum spring constant of the bungee cord?(connect tutorial: spring scale)75. A 2.0 kg block is released from rest and allowed toslide down a frictionless surface and into a spring. Thefar end of the spring is attached to a wall, as shown.The initial height of the block is 0.50 m above the low-est part of the slide and the spring constant is 450 N/m.(a) What is the block's speed when it is at a height of0.25 m above the base of the slide? (b) How far is thespring compressed?(c) The spring sendsthe block back to theleft. How high doesthe block rise?isga-ularmmmentelas-y thisoscopeoms orind theing thene as ause ane capsidr data ofin nano-(in nano-ant of thelow muchProblems 75 and 118when it is76. A block (mass m) banno Cstant k) A pole-vaulter converts the kinetic energy of runningto elastic potential energy in the pole, which is thenconverted to gravitational potential energy. If a pole-vaulter's center of gravity is 1.0 m above the groundwhile he sprints at 10.0 m/s, what is the maximumheight of his center of gravity during the vault? For anextended object, the gravitational potential energy isU = mgh, where h is the height of the center of grav-ity. (In 1988, Sergei Bubka was the first pole-vaulterever to clear 6 m.)107. A hang glider moving at speed 9.5 m/s dives to analtitude 8.2 m lower. Ignoring drag, how fast is it thenmoving?108. A car moving at 30 mi/h is stopped by jamming on

Answered: Image /qna-images/answer/6262b65b-a84a-4543-8df9-8deb81bb59e3.jpg

it is stretched.] 55.0 m over the river below. The bungee cord has an unstretched length of 27.0 m. To be safe, the bungee cord should stop Jorge's fall when he is at least 2.00 m above the river. If Jorge has a mass of 75.0 kg, what is the minimum spring constant of the bungee cord? (connect tutorial: spring scale) 74. Jorge is going to bungee jump from a is

it is stretched.] 55.0 m over the river below. The bungee cord has an unstretched length of 27.0 m. To be safe, the bungee cord should stop Jorge's fall when he is at least 2.00 m above the river. If Jorge has a mass of 75.0 kg, what is the minimum spring constant of the bungee cord? (connect tutorial: spring scale) 74. Jorge is going to bungee jump from a is

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)...

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Concept explainers

Spring Potential Energy

The potential energy is the energy possessed by a body by virtue of its position or the energy held by the object due to its position relative to other objects, its force like stresses, charge, and other factors affecting the particles of the body. The potential energy is the measure of the net work done by or on the body. The spring potential energy is the potential energy stored due to the deformation of an elastic spring and this elasticity is due to the stretched spring. The elasticity is the ability of a solid-state matter to come back to its equilibrium position or original position after any kind of external force is acted on it. It is also known as Elastic potential energy. The potential energy here is caused due to the displacement of the spring from its equilibrium position to another position and this potential energy is equal to the net work done due to the stretching of the spring. It also resembles the same mechanics of the oscillation of a simple pendulum, where due to the external force, the object moves from its equilibrium position to its maximum ends and the periodic motion continues till it comes back to the equilibrium position to rest. 

Question

74, 75, 107

[Hint: Assume
it is stretched.]
74. Jorge is going to bungee jump from a bridge that is
55.0 m over the river below. The bungee cord has an
unstretched length of 27.0 m. To be safe, the bungee
cord should stop Jorge's fall when he is at least 2.00 m
above the river. If Jorge has a mass of 75.0 kg, what
is the minimum spring constant of the bungee cord?
(connect tutorial: spring scale)
75. A 2.0 kg block is released from rest and allowed to
slide down a frictionless surface and into a spring. The
far end of the spring is attached to a wall, as shown.
The initial height of the block is 0.50 m above the low-
est part of the slide and the spring constant is 450 N/m.
(a) What is the block's speed when it is at a height of
0.25 m above the base of the slide? (b) How far is the
spring compressed?
(c) The spring sends
the block back to the
left. How high does
the block rise?
is
ga-
ular
mm
ment
elas-
y this
oscope
oms or
ind the
ing the
ne as a
use an
e capsid
r data of
in nano-
(in nano-
ant of the
low much
Problems 75 and 118
when it is
76. A block (mass m) banno C
stant k)

A pole-vaulter converts the kinetic energy of running
to elastic potential energy in the pole, which is then
converted to gravitational potential energy. If a pole-
vaulter's center of gravity is 1.0 m above the ground
while he sprints at 10.0 m/s, what is the maximum
height of his center of gravity during the vault? For an
extended object, the gravitational potential energy is
U = mgh, where h is the height of the center of grav-
ity. (In 1988, Sergei Bubka was the first pole-vaulter
ever to clear 6 m.)
107. A hang glider moving at speed 9.5 m/s dives to an
altitude 8.2 m lower. Ignoring drag, how fast is it then
moving?
108. A car moving at 30 mi/h is stopped by jamming on

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