International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN: 9781305501607

Author: Andrew Pytel And Jaan Kiusalaas

Publisher: CENGAGE L

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Turning moment 1mm = 60
Nm: crank angle, 1 mm = 1°
. The turning moment shows the maximum energy that needs to be
stored by the flywheel in the unit area is 2850 m²
. The flywheel rotates at an average speed of 220
rpm with a total speed change of 2.5%. If the mass of the flywheel is 500 kg, find the appropriate
dimensions (inner diameter, outer diameter and thickness) of the flywheel. Given that inner
diameter of the flywheel is 0.9 outer diameter and the density is 7.2 Mg/m³
.

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FOR FIG REFER THE ATTACHED IMAGE
The shaft is massless. A thin attached triangular mass ‘m’ is mounted on the shaft. Rotational speed of the shaft is ω. Neglect weight effect of attached mass. Bearings are at A and B.
Take Z- axis along the shaft axis. X- axis is vertically downward. Y – axis is horizontal. Take origin at mid-point on the shaft.
Question:
Under what practical condition can we justify the neglecting of weight of the attached triangular body?

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FOR FIG REFER ATTACHED FILE
The shaft is massless. A thin attached triangular mass ‘m’ is mounted on the shaft. Rotational speed of the shaft is ω. Neglect weight effect of attached mass. Bearings are at A and B.
Take Z- axis along the shaft axis. X- axis is vertically downward. Y – axis is horizontal. Take origin at mid-point on the shaft.
Question:
Rotate the shaft by 90 degrees and write the bearing reactions at A and B.

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A spacecraft must be maneuvered through an angle of 6O-deg in 30 s. The spacecraft moment of inertia is 8000 kg-m^2; the thrusters are located at a radius of 2.2 m from the center of mass. What is the minimum thrust level for the thrusters?
Answer : 1.90 N.
Don't give me wrong answers. correct answer is 1.90....show me how

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1.A rotor has an inner radius of 10.0 cm and an outer radius of 25.0 cm. It is fixed to a frictionless axle that goes through its center. The moment of inertia (I) of the rotor is 0.0235 kg m2. A set of 5 constant forces act on the rotor, as shown in the diagram below.
(a) Find the net torque acting on the rotor, in units of Nm. Be sure to give both the magnitude and direction.
(b) Find the angular acceleration of the rotor, in units of rad/s2. Give both the magnitude and direction.
(c) Assuming it starts from rest at t = 0, how long does it take for the rotor to reach an angular speed of 565 revolutions pre minute (rpm)? Give your answer in seconds.
(d) At t = 2.50 seconds, how many complete revolutions will the rotor have made?

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The cranks and connecting rods of a four cylinder in-line engine running at 2000 rpm are 60mm and 240mm each respectively. The cylinders are spaced 150 mm apart. If the cylinders are numbered 1 to 4 in sequence from one end, the cranks appear at intervals of 90º in an end view in the order 1-4-2-3.The reciprocating mass for each cylinder is 15 kg. Determine (i) unbalanced primary and secondary forces, (ii) unbalanced primary and secondary couples with reference to central plane of the engine

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An inside cylinder locomotive has its cylinder centre lines 1 m apart and has a stroke of 1 m. The rotating masses per cylinder are equivalent to 100 kg at the crank pin, and the reciprocating masses per cylinder to 200 kg. The wheel centre lines are 2 m apart. The cranks are at right angles. The whole of the rotating and 2/3 of the reciprocating masses are to be balanced by masses placed at a radius of 0.8 m. Find the magnitude of the balancing mass on the right most wheel.
Select one:
A.
55.32 kg
B.
322.3 kg
C.
225.3 kg
D.
115.3 kg

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a steam engine runs at 150rpm. its turning moment diagram gave the areas in mm2 taken in order above and below the mean torque line is 500,250,270,390,190,340,270,250, the scale for turning moment is 1mm=500mnm, 1mm=5’ if the fluctuation of speed is not to exceed +or-1.5% of mean, determine a suitable diameter and cross-section of the rim of flywheel with axial dimension equal to 1.5times the radial dimension. the hoop stress is limited to 3mpa and the density of material of flywheel is 7500kg/m3.

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What is the power (?) lost to main crankshaft friction in a four-cylinder engine with a 100mmbore and stroke if the engine is operating at 1500 rpm? Assume the main crankshafthas five bearings, each with a diameter of 50 mm and length of 25 mm.
in hand written

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A crankline mechanism like these below, if it is known that O2A length is 5 cm, ab length is 10 centimeters and p = 100 newtons look for the forces that are occurring in the mechanism and the torque on link 2.

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What is the power (?) lost to main crankshaft friction in a four-cylinder engine with a 100mmbore and stroke if the engine is operating at 1500 rpm? Assume the main crankshafthas five bearings, each with a diameter of 50 mm and length of 25 mm.

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pleassssse solve question 6, statics

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