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An electrically driven road vehicle of mass 450kg has four wheels of effective diameter 400mm radius of gyration 125mm and mass 9kg. The armature of the electric motor has a mass of 65kg a radius of gyration of 100mm and rotates at 4 times the speed of the road wheels. The rolling resistance to motion of the vehicle is to be assumed constant at 225N. Determine the acceleration of the vehicle if it is allowed to run freely down a slope whose inclination to the horizontal is sin-¹ 0.2
joint are made of same material and the permissible stresses are 60 N/mm2
in tension, 125 N/mm2
in compression and 70 N/mm2
in shear
around the circumference of the shaft. Determine the size of weld if the
torque on the shaft is 3KN-m. The allowable shear stress in the weld is 70
N/mm2
Coefficient of linear expansion for steel, = 11×10^-6/
QUESTION 4
4.1 Determine L t Ht 2 ( 3) (3)
4.2 Determine 2 3 4cosh3 t Le t . (2)
4.2 Determine 1
2
5
4 20
s L
s s
(5)
4.3 Determine 1
2
2 3
4 13
s L
s s
A 4 m long ladder is supported by a wall and floor as shown in Figure. The coefficient of friction at the wall is 0.30 and that the floor is 0.50. The weight of the ladder is 200 N. The ladder supports a vertical load of 800 N at C. Solve for the reactions at the floor and wall. Compute the least value of at which the ladder may be placed without slipping.
Air enters the compressor of a gas turbine at 100 kPa and 25°C. For a pressure ratio of 5 and a maximum temperature of 850°C determine the back work ratio and the thermal efficiency using the Brayton cycle.
#333702 on Dec 2022