978-0073398242 Chapter 13 Solution Manual Part 1

subject Type Homework Help
subject Pages 9
subject Words 1224
subject Authors Brian Self, David Mazurek, E. Johnston, Ferdinand Beer, Phillip Cornwell

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CHAPTER 13
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PROBLEM 13.1
A 400-kg satellite is placed in a circular orbit 6394 km above the surface of the earth. At this elevation the
acceleration of gravity is
2
4.09 m/s .
Knowing that its orbital speed is 20 000 km/h, determine the kinetic
energy of the satellite.
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PROBLEM 13.2
A 1-lb stone is dropped down the “bottomless pit” at
Carlsbad Caverns and strikes the ground with a speed
of 95 ft/s. Neglecting air resistance, determine (a) the
kinetic energy of the stone as it strikes the ground and
the height h from which it was dropped, (b) Solve Part
a assuming that the same stone is dropped down a hole
on the moon. (Acceleration of gravity on the moon =
5.31 ft/s2.)
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PROBLEM 13.3
A baseball player hits a 5.1-oz baseball with an initial velocity of 140 ft/s at
an angle of 40° with the horizontal as shown. Determine (a) the kinetic
energy of the ball immediately after it is hit, (b) the kinetic energy of the ball
when it reaches its maximum height, (c) the maximum height above the
ground reached by the ball.
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PROBLEM 13.4
A 500-kg communications satellite is in a circular geosynchronous orbit and completes one revolution about
the earth in 23 h and 56 min at an altitude of 35800 km above the surface of the earth. Knowing that the radius
of the earth is 6370 km, determine the kinetic energy of the satellite.
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PROBLEM 13.5
In an ore-mixing operation, a bucket full of ore is suspended
from a traveling crane which moves along a stationary bridge.
The bucket is to swing no more than 10 ft horizontally when
the crane is brought to a sudden stop. Determine the maximum
allowable speed v of the crane.
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PROBLEM 13.6
In an ore-mixing operation, a bucket full of ore is suspended
from a traveling crane which moves along a stationary bridge.
The crane is traveling at a speed of 10 ft/s when it is brought to
a sudden stop. Determine the maximum horizontal distance
through which the bucket will swing.
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PROBLEM 13.7
Determine the maximum theoretical speed that may be achieved over a distance of 110 m by a car starting
from rest assuming there is no slipping. The coefficient of static friction between the tires and pavement is 0.75,
and 60 percent of the weight of the car is distributed over its front wheels and 40 percent over its rear wheels.
Assume (a) front-wheel drive, (b) rear-wheel drive.
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PROBLEM 13.8
A 2000-kg automobile starts from rest at point A on a
o
6
incline and coasts through a distance of 150 m to point B. The
brakes are then applied, causing the automobile to come to a
stop at point C, 20 m from B. Knowing that slipping is
impending during the braking period and neglecting air
resistance and rolling resistance, determine (a) the speed of the
automobile at point B, (b) the coefficient of static friction
between the tires and the road.

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