Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN: 9781305116399
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Question
Chapter 8, Problem 8.27P
(a)
To determine
Whether the child-earth system is isolated or not.
(b)
To determine
Whether there is a non-conservative force acting within the system or not.
(c)
To determine
The total energy of the earth-child system when the child is at the top of the water slide.
(d)
To determine
The expression for the total energy of the system at the launching point.
(e)
To determine
The expression for the total energy of the system at the highest point in her projectile motion.
(f)
To determine
The speed of child at launching point.
(g)
To determine
The maximum airborne height
(h)
To determine
Whether the answers would be same if the waterslide were not frictionless.
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13. A child of mass m starts from rest and slides without fric-
|GP tion from a height h along a slide next to a pool (Fig. P8.13).
QIC She is launched from a height h/5 into the air over the pool.
S We wish to find the maximum height she reaches above the
water in her projectile motion. (a) Is the child-Earth system
isolated or nonisolated? Why? (b) Is there a nonconservative
force acting within the system? (c) Define the configuration
of the system when the child is at the water level as having
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of the system when the child is at the top of the waterslide.
(d) Express the total energy of the system when the child is
at the launching point. (e) Express the total energy of the
system when the child is at the highest point in her projec-
tile motion. (f) From parts (c) and (d), determine her initial
Уmax
th/5 1
Figure P8.13
13. A child of mass m starts from rest and slides without fric-
GP tion from a height h along a slide next to a pool (Fig. P8.13).
QIC She is launched from a height h/5 into the air over the pool.
We wish to find the maximum height she reaches above the
water in her projectile motion. (a) Is the child-Earth system
isolated or nonisolated? Why? (b) Is there a nonconservative
force acting within the system? (c) Define the configuration
of the system when the child is at the water level as having
zero gravitational potential energy. Express the total energy
of the system when the child is at the top of the waterslide.
(d) Express the total energy of the system when the child is
at the launching point. (e) Express the total energy of the
system when the child is at the highest point in her projec-
tile motion. (f) From parts (c) and (d), determine her initial
A pendulum of mass m and length is initially at rest at an angle 8. The pendulum
then swings down and collides elastically with a stationary block of mass M. The
block slides along the surface and eventually stops when it encounters a rough
patch of length |Ad|.
Assume that m = 1.7kg, L = 0.80m, 0 = 67, M 2.8kg and Ad = 0.55m.
a) Calculate the speed of the block immediately after the elastic collision.
b) What is the coefficient of kinetic friction of the rough patch?
Chapter 8 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
Ch. 8 - By what transfer mechanisms does energy enter and...Ch. 8 - Consider a block sliding over a horizontal surface...Ch. 8 - A rock of mass m is dropped to the ground from a...Ch. 8 - Three identical balls are thrown from the top of a...Ch. 8 - You are traveling along a freeway at 65 mi/h. Your...Ch. 8 - You hold a slingshot at arms length, pull the...Ch. 8 - Two children stand on a platform at the top of a...Ch. 8 - At the bottom of an air track tilted at angle , a...Ch. 8 - An athlete jumping vertically on a trampoline...Ch. 8 - Answer yes or no to each of the following...
Ch. 8 - In a laboratory model of cars skidding to a stop,...Ch. 8 - What average power is generated by a 70.0-kg...Ch. 8 - A ball of clay falls freely to the hard floor. It...Ch. 8 - A pile driver drives posts into the ground by...Ch. 8 - One person drops a ball from the top of a building...Ch. 8 - A car salesperson claims that a 300-hp engine is a...Ch. 8 - Prob. 8.3CQCh. 8 - Prob. 8.4CQCh. 8 - Prob. 8.5CQCh. 8 - Prob. 8.6CQCh. 8 - In the general conservation of energy equation,...Ch. 8 - Consider the energy transfers and transformations...Ch. 8 - A block is connected to a spring that is suspended...Ch. 8 - In Chapter 7, the work-kinetic energy theorem, W =...Ch. 8 - For each of the following systems and time...Ch. 8 - Prob. 8.2PCh. 8 - A block of mass 0.250 kg is placed on top of a...Ch. 8 - A 20.0-kg cannonball is fired from a cannon with...Ch. 8 - cal energy of the ballEarth sys-tem at the maximum...Ch. 8 - A block of mass m = 5.00 kg is released from point...Ch. 8 - Two objects are connected by a light string...Ch. 8 - Prob. 8.8PCh. 8 - A light, rigid rod is 77.0 cm long. 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It moves...Ch. 8 - Prob. 8.39PCh. 8 - Energy is conventionally measured in Calories as...Ch. 8 - A loaded ore car has a mass of 950 kg and rolls on...Ch. 8 - Make an order-of-magnitude estimate of your power...Ch. 8 - A small block of mass m = 200 g is released from...Ch. 8 - Prob. 8.44APCh. 8 - Review. A boy starts at rest and slides down a...Ch. 8 - Review. As shown in Figure P8.26, a light string...Ch. 8 - A 4.00-kg particle moves along the x axis. Its...Ch. 8 - Why is the following situation impossible? A...Ch. 8 - A skateboarder with his board can be modeled as a...Ch. 8 - Heedless of danger, a child leaps onto a pile of...Ch. 8 - Jonathan is riding a bicycle and encounters a hill...Ch. 8 - Jonathan is riding a bicycle and encounters a hill...Ch. 8 - Consider the blockspringsurface system in part (B)...Ch. 8 - As it plows a parking lot, a snowplow pushes an...Ch. 8 - Prob. 8.55APCh. 8 - Prob. 8.56APCh. 8 - As the driver steps on the gas pedal, a car of...Ch. 8 - Review. Why is the following situation impossible?...Ch. 8 - A horizontal spring attached to a wall has a force...Ch. 8 - More than 2 300 years ago, the Greek teacher...Ch. 8 - A child's pogo stick (Fig. P8.61) stores energy in...Ch. 8 - A 1.00-kg object slides to the right on a surface...Ch. 8 - A 10.0-kg block is released from rest at point in...Ch. 8 - Prob. 8.64APCh. 8 - A block of mass 0.500 kg is pushed against a...Ch. 8 - Review. As a prank, someone has balanced a pumpkin...Ch. 8 - Review. The mass of a car is 1 500 kg. The shape...Ch. 8 - A pendulum, comprising a light string of length L...Ch. 8 - A block of mass M rests on a table. It is fastened...Ch. 8 - Review. 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