A 400-kg satellite was placed in a circular orbit 1500 km above the surface of the earth. At this elevation the acceleration of gravity is 6.43 m/s?. Determine the kinetic energy of the satellite, knowing that its orbital speed is 25.6 x 10 km/h. The small cart has a speed vA = 4 m/s as it passes point A. It moves without appreciable friction and passes over the top hump of the track. Determine the cart speed as it passes point B. A=4 m/s 1.8 m B A 1-lb stone is dropped down the "bottomless pit" at Carlsbad Caverns and strike the ground with a speed of 95ft/s. Neglecting air resistance, determine (a) the kinetic energy of the stone as it strikes the ground and the height h fro 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.) A package is projected up a 15° incline at A with an initial velocity of 8 m/s. Knowing that the coefficient of kinetic friction between the package and the incline is 0.12, determine 10 m C B (a) the maximum distance d that the package will move up the incline, 15 (b) the velocity of the package as it returns to its original position. Car B is towing car A at a constant speed of 10 m/s on an uphill grade when the brakes of car A are fully applied causing all four wheels to skid. The driver of car B does not change the throttle setting or change gears. The masses of the cars A and B are 1400 kg and 1200 kg, respectively, and the coefficient of kinetic friction is 0.8. Neglecting air resistance and rolling resistance, determine (a) 5 m 10 m/s 10 m/s the distance traveled by the cars before they come to a stop, (b) the tension in the cable.
A 400-kg satellite was placed in a circular orbit 1500 km above the surface of the earth. At this elevation the acceleration of gravity is 6.43 m/s?. Determine the kinetic energy of the satellite, knowing that its orbital speed is 25.6 x 10 km/h. The small cart has a speed vA = 4 m/s as it passes point A. It moves without appreciable friction and passes over the top hump of the track. Determine the cart speed as it passes point B. A=4 m/s 1.8 m B A 1-lb stone is dropped down the "bottomless pit" at Carlsbad Caverns and strike the ground with a speed of 95ft/s. Neglecting air resistance, determine (a) the kinetic energy of the stone as it strikes the ground and the height h fro 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.) A package is projected up a 15° incline at A with an initial velocity of 8 m/s. Knowing that the coefficient of kinetic friction between the package and the incline is 0.12, determine 10 m C B (a) the maximum distance d that the package will move up the incline, 15 (b) the velocity of the package as it returns to its original position. Car B is towing car A at a constant speed of 10 m/s on an uphill grade when the brakes of car A are fully applied causing all four wheels to skid. The driver of car B does not change the throttle setting or change gears. The masses of the cars A and B are 1400 kg and 1200 kg, respectively, and the coefficient of kinetic friction is 0.8. Neglecting air resistance and rolling resistance, determine (a) 5 m 10 m/s 10 m/s the distance traveled by the cars before they come to a stop, (b) the tension in the cable.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A 400-kg satellite was placed in a circular orbit 1500 km above the surface of the earth.
At this elevation the acceleration of gravity is 6.43 m/s?. Determine the kinetic energy of
the satellite, knowing that its orbital speed is 25.6 x 10 km/h.
The small cart has a speed vA = 4 m/s as it
passes point A. It moves without appreciable
friction and passes over the top hump of the
track. Determine the cart speed as it passes
point B.
A=4 m/s
1.8 m
B
A 1-lb stone is dropped down the "bottomless pit" at Carlsbad Caverns and strike
the ground with a speed of 95ft/s. Neglecting air resistance, determine
(a) the kinetic energy of the stone as it strikes the ground and the height h fro
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.)
A package is projected up a 15° incline at A
with an initial velocity of 8 m/s. Knowing
that the coefficient of kinetic friction
between the package and the incline is 0.12,
determine
10 m
C
B
(a) the maximum distance d that the package
will move up the incline,
15
(b) the velocity of the package as it returns
to its original position.
Car B is towing car A at a constant speed of
10 m/s on an uphill grade when the brakes of
car A are fully applied causing all four wheels
to skid. The driver of car B does not change
the throttle setting or change gears. The
masses of the cars A and B are 1400 kg and 1200
kg, respectively, and the coefficient of
kinetic friction is 0.8. Neglecting air
resistance and rolling resistance, determine
(a)
5 m
10 m/s
10 m/s
the distance traveled by the cars before they come to a stop,
(b)
the tension in the cable.
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