Question
In: Civil Engineering
Dynamics of Rigid Bodies 1. The body has a mass of 100 kg and is pulled...
Dynamics of Rigid Bodies
1. The body has a mass of 100 kg and is pulled up a 75
percent inclined by a force P. The coefficient of friction f is
0.25 between contacting surfaces.
a) determine the constant value of P required to bring the body
from the rest to a velocity of 6 m/s in 10s
b) what value of P will then suffice to maintain that
velocity?
2. A nozzle on the end of a fire hose is 20 m from a vertical wall and makes an angles of 45 degrees with the horizontal. If the stream strikes the wall at a point 8 m above the nozzle, what us the velocity of water as it leaves the nozzle?
Solutions
Ally Wells answered 1 year agoRelated Solutions
a ) The moment of inertia of a rigid body, of mass 40 kg, about an...
a ) The moment of inertia of a rigid body, of mass 40 kg, about
an axis through a point at 0.5 m from the mass centre, is 110
kg.m2. What is the moment inertia of the same body about an axis,
parallel to the first, at a distance 1.0 m from the mass
centre?
[4 marks]
i) A metal hoop, with mass m concentrated along its
rim, has radius r, and rolls on a fixed surface without
slipping. It...
Two celestial bodies are apart. One body has a mass of , and the second has a mass...
Two celestial bodies are apart. One body has a mass
of , and the second has a mass of Calculate
the strength of the gravitational force exerted by one body on the
other.
A sledge loaded with bricks has a total mass of 18.2 kg and is pulled at...
A sledge loaded with bricks has a total mass of 18.2 kg and is
pulled at constant speed by a rope. The rope is inclined at 20.1°
above the horizontal, and the sledge moves a distance of 19.2 m on
a horizontal surface. The coefficient of kinetic friction between
the sledge and surface is 0.500.
(a) What is the tension of the rope?
N
(b) How much work is done by the rope on the sledge?
kJ
(c) What is...
A block with a mass of 3.2 kg is pulled by a force of 60 N...
A block with a mass of 3.2 kg is pulled by a force of 60 N up a
ramp with a coefficient of kinetic friction of .05 on a 12°
incline.
a. What is the magnitude of the block’s acceleration?
b. Draw a free body diagram of this block.
A box of mass ?=20.5 kg is pulled up a ramp that is inclined at an...
A box of mass ?=20.5 kg is pulled up a ramp that is inclined at
an angle ?=19.0∘ angle with respect to the horizontal. The
coefficient of kinetic friction between the box and the ramp is
?k=0.305 , and the rope pulling the box is parallel to the ramp. If
the box accelerates up the ramp at a rate of ?=2.89 m/s2 ,
calculate the tension ?T in the rope. Use ?=9.81 m/s2 for the
acceleration due to gravity.
A mass m = 17 kg is pulled along a horizontal floor, with a coefficient of...
A mass m = 17 kg is pulled along a horizontal floor, with a
coefficient of kinetic friction μk = 0.06, for a
distance d = 5.1 m. Then the mass is continued to be pulled up a
frictionless incline that makes an angle θ = 28° with the
horizontal. The entire time the massless rope used to pull the
block is pulled parallel to the incline at an angle of θ = 28°
(thus on the incline it is...
A mass m = 16 kg is pulled along a horizontal floor with NO friction for...
A mass m = 16 kg is pulled along a horizontal floor with NO
friction for a distance d =8.4 m. Then the mass is pulled up an
incline that makes an angle ? = 25
A mass m = 17 kg is pulled along a horizontal floor, with a coefficient of...
A mass m = 17 kg is pulled along a horizontal floor, with a
coefficient of kinetic friction ?k = 0.06, for a distance d = 6.7
m. Then the mass is continued to be pulled up a frictionless
incline that makes an angle ? = 33° with the horizontal. The entire
time the massless rope used to pull the block is pulled parallel to
the incline at an angle of ? = 33° (thus on the incline it is...
A box of mass m=19.0 kg is pulled up a ramp that is inclined at an...
A box of mass m=19.0 kg is pulled up a ramp that is inclined at
an angle θ=15.0∘ angle with respect to the horizontal. The
coefficient of kinetic friction between the box and the ramp is
μk=0.295 , and the rope pulling the box is parallel to the ramp. If
the box accelerates up the ramp at a rate of a=3.09 m/s2, calculate
the tension FT in the rope. Use g=9.81 m/s2 for the acceleration
due to gravity.
A mass m = 17 kg is pulled along a horizontal floor with NO friction for...
A mass m = 17 kg is pulled along a horizontal floor with NO
friction for a distance d =5.7 m. Then the mass is pulled up an
incline that makes an angle θ = 34° with the horizontal and has a
coefficient of kinetic friction μk = 0.38. The entire time the
massless rope used to pull the block is pulled parallel to the
incline at an angle of θ = 34° (thus on the incline it is parallel...
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