Engineering Mechanics: Statics
13th Edition
ISBN: 9780132915540
Author: Russell C. Hibbeler
Publisher: Prentice Hall
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Chapter 11.7, Problem 28P
To determine
The positions for equilibrium and investigate the stability for each position.
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9. Design a spur gear drive required to transmit 45 kW at a pinion speed of 800 r.p.m. The velocity ratio
is 3.5 : 1. The teeth are 20° full-depth involute with 18 teeth on the pinion. Both the pinion and gear
are made of steel with a maximum safe static stress of 180 MPa. Assume a safe stress of 40 MPa for
the material of the shaft and key.
10. Design a pair of spur gears with stub teeth to transmit 55 kW from a 175 mm pinion running at 2500
r.p.m. to a gear running at 1500 r.p.m. Both the gears are made of steel having B.H.N. 260. Approximate
the pitch by means of Lewis equation and then adjust the dimensions to keep within the limits set by
the dynamic load and wear equation.
7. A motor shaft rotating at 1440 r.p.m. has to transmit 15 kW to a low speed shaft rotating at 500 r.p.m.
The teeth are 20° involute with 25 teeth on the pinion. Both the pinion and gear are made of cast iron
with a maximum safe stress of 56 MPa. A safe stress of 35 MPa may be taken for the shaft on which
the gear is mounted. Design and sketch the spur gear drive to suit the above conditions. The starting
torque may be assumed as 1,25 times the running torque.
Ruins 20 LW at 100 nm to another shaft running approxi
6.
A two stage reduction drive is to be designed to transmit 2 kW; the input speed being 960 r.p.m. and
overall reduction ratio being 9. The drive consists of straight tooth spur gears only, the shafts being
spaced 200 mm apart, the input and output shafts being co-axial.
Chapter 11 Solutions
Engineering Mechanics: Statics
Ch. 11.3 - Each link has a mass of 20 kg.Ch. 11.3 - Determine the magnitude of force P required to...Ch. 11.3 - Determine the angle for equilibrium. The spring...Ch. 11.3 - Determine the angle for equilibrium. The spring...Ch. 11.3 - Prob. 5FPCh. 11.3 - Determine the angle for equilibrium. The spring...Ch. 11.3 - Each of the four links has a length L and is pin...Ch. 11.3 - The lamp weighs 10 lb.Ch. 11.3 - Prob. 3PCh. 11.3 - Prob. 4P
Ch. 11.3 - Prob. 5PCh. 11.3 - Prob. 6PCh. 11.3 - It vertical forces P1 = P2 = 30 lb act at C and E...Ch. 11.3 - Prob. 8PCh. 11.3 - if the uniform inks AB and CD each weigh 10 lb....Ch. 11.3 - Prob. 10PCh. 11.3 - Prob. 11PCh. 11.3 - Prob. 12PCh. 11.3 - Prob. 13PCh. 11.3 - Prob. 14PCh. 11.3 - Prob. 15PCh. 11.3 - Prob. 16PCh. 11.3 - Prob. 17PCh. 11.3 - Prob. 18PCh. 11.3 - Prob. 19PCh. 11.3 - The lever is in balance when the load and block...Ch. 11.3 - If the load F weighs 20 lb and the block G weighs...Ch. 11.3 - Determine the force in the hydraulic cylinder...Ch. 11.3 - Determine the horizontal compressive force F...Ch. 11.3 - Prob. 24PCh. 11.3 - Prob. 25PCh. 11.7 - Prob. 26PCh. 11.7 - If the potential function for a conservative...Ch. 11.7 - Prob. 28PCh. 11.7 - Determine the equilibrium positions and...Ch. 11.7 - Prob. 30PCh. 11.7 - Prob. 31PCh. 11.7 - Determine the angle for equilibrium when a weight...Ch. 11.7 - Prob. 33PCh. 11.7 - Prob. 34PCh. 11.7 - Prob. 35PCh. 11.7 - The bars each have a mass of 3 Kg one the...Ch. 11.7 - Prob. 37PCh. 11.7 - Prob. 38PCh. 11.7 - Prob. 39PCh. 11.7 - It is unstretched when the rod assembly is in the...Ch. 11.7 - Prob. 41PCh. 11.7 - Determine the weight W2, that is on the pan in...Ch. 11.7 - Prob. 43PCh. 11.7 - Determine the steepest grade along which it can...Ch. 11.7 - Prob. 45PCh. 11.7 - Prob. 46PCh. 11.7 - Point C is coincident with B when OA is...Ch. 11.7 - If the block has three equal sides of length d,...Ch. 11.7 - Prob. 49PCh. 11.7 - Prob. 50RPCh. 11.7 - Prob. 51RPCh. 11.7 - Prob. 52RPCh. 11.7 - Prob. 53RPCh. 11.7 - Prob. 54RPCh. 11.7 - Prob. 55RPCh. 11.7 - Prob. 56RPCh. 11.7 - Prob. 57RPCh. 11.7 - Prob. 58RPCh. 11.7 - If both spring DE and BC are unstretched when =...Ch. 11.7 - Prob. 60RPCh. 11.7 - Prob. 61RPCh. 11.7 - Determine the horizontal force P required to hold...
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