Engineering Mechanics: Dynamics
8th Edition
ISBN: 9781118885840
Author: James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher: WILEY
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Chapter 3.4, Problem 30P
To determine
The resulting forward acceleration of the bicycle.
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6/86 The connecting rod AB of a certain internal-combustion engine weighs 1.2 lb with mass center at G
and has a radius of gyration about G of 1.12 in. The piston and piston pin A together weigh 1.80 lb. The
engine is running at a constant speed of 3000 rev/min, so that the angular velocity of the crank is
3000(2)/60 = 100л rad/sec. Neglect the weights of the components and the force exerted by the gas in
the cylinder compared with the dynamic forces generated and calculate the magnitude of the force on the
piston pin A for the crank angle 0 = 90°. (Suggestion: Use the alternative moment relation, Eq. 6/3, with B
as the moment center.)
Answer
A = 347 lb
3"
1.3"
B
1.7"
PROBLEM 6/86
6/85 In a study of head injury against the instrument panel of a car during sudden or crash stops where
lap belts without shoulder straps or airbags are used, the segmented human model shown in the figure is
analyzed. The hip joint O is assumed to remain fixed relative to the car, and the torso above the hip is
treated as a rigid body of mass m freely pivoted at O. The center of mass of the torso is at G with the initial
position of OG taken as vertical. The radius of gyration of the torso about O is ko. If the car is brought to a
sudden stop with a constant deceleration a, determine the speed v relative to the car with which the
model's head strikes the instrument panel. Substitute the values m = 50 kg, 7 = 450 mm, r = 800 mm, ko
= 550 mm, 0 = 45°, and a = 10g and compute v.
Answer
v = 11.73 m/s
PROBLEM 6/85
Chapter 3 Solutions
Engineering Mechanics: Dynamics
Ch. 3.4 - Prob. 1PCh. 3.4 - The 50-kg crate is stationary when the force P is...Ch. 3.4 - At a certain instant, the 80-lb crate has a...Ch. 3.4 - A man pulls himself up the 15° incline by the...Ch. 3.4 - The 10-Mg truck hauls the 20-Mg trailer. If the...Ch. 3.4 - A 60-kg woman holds a 9-kg package as she stands...Ch. 3.4 - During a brake test, the rear-engine car is...Ch. 3.4 - Prob. 8PCh. 3.4 - The inexperienced driver of an all-wheel-drive car...Ch. 3.4 - Prob. 10P
Ch. 3.4 - The 300-Mg jet airliner has three engines, each of...Ch. 3.4 - Prob. 12PCh. 3.4 - The system of the previous problem is now placed...Ch. 3.4 - Prob. 14PCh. 3.4 - Prob. 15PCh. 3.4 - Prob. 16PCh. 3.4 - Prob. 17PCh. 3.4 - Prob. 18PCh. 3.4 - A worker develops a tension T in the cable as he...Ch. 3.4 - The wheeled cart of Prob. 3/19 is now replaced...Ch. 3.4 - Prob. 21PCh. 3.4 - Prob. 22PCh. 3.4 - Prob. 23PCh. 3.4 - Prob. 24PCh. 3.4 - Prob. 25PCh. 3.4 - Prob. 26PCh. 3.4 - Prob. 27PCh. 3.4 - Prob. 28PCh. 3.4 - Prob. 29PCh. 3.4 - Prob. 30PCh. 3.4 - Prob. 31PCh. 3.4 - Prob. 32PCh. 3.4 - Prob. 33PCh. 3.4 - Prob. 34PCh. 3.4 - Prob. 35PCh. 3.4 - Prob. 36PCh. 3.4 - Prob. 37PCh. 3.4 - Prob. 38PCh. 3.4 - Prob. 39PCh. 3.4 - Prob. 40PCh. 3.4 - Prob. 41PCh. 3.4 - Prob. 42PCh. 3.4 - Prob. 43PCh. 3.4 - Prob. 44PCh. 3.4 - Prob. 45PCh. 3.4 - Two iron spheres, each of which is 100 mm in...Ch. 3.5 - The small 2-kg block A slides down the curved path...Ch. 3.5 - If the 2-kg block passes over the top B of the...Ch. 3.5 - Prob. 49PCh. 3.5 - If the 180-lb ski-jumper attains a speed of 80...Ch. 3.5 - The 4-oz slider has a speed v = 3 ft/sec as it...Ch. 3.5 - Prob. 52PCh. 3.5 - Prob. 53PCh. 3.5 - Determine the speed which the 630-kg four-man...Ch. 3.5 - The hollow tube is pivoted about a horizontal axis...Ch. 3.5 - Prob. 56PCh. 3.5 - Prob. 57PCh. 3.5 - Prob. 58PCh. 3.5 - Prob. 59PCh. 3.5 - Prob. 60PCh. 3.5 - The standard test to determine the maximum lateral...Ch. 3.5 - Prob. 62PCh. 3.5 - Prob. 63PCh. 3.5 - Prob. 64PCh. 3.5 - Prob. 65PCh. 3.5 - A 0.2-kg particle P is constrained to move along...Ch. 3.5 - Prob. 67PCh. 3.5 - At the instant under consideration, the cable...Ch. 3.5 - Prob. 69PCh. 3.5 - The slotted arm OA rotates about a fixed axis...Ch. 3.5 - Prob. 71PCh. 3.5 - Prob. 72PCh. 3.5 - Prob. 73PCh. 3.5 - Prob. 74PCh. 3.5 - Prob. 75PCh. 3.5 - Prob. 76PCh. 3.5 - Prob. 77PCh. 3.5 - The 0.1-lb projectile A is subjected to a drag...Ch. 3.5 - Determine the speed v at which the race car will...Ch. 3.5 - The small object is placed on the inner surface of...Ch. 3.5 - The small object of mass m is placed on the...Ch. 3.5 - Prob. 82PCh. 3.5 - The slotted arm revolves in the horizontal plane...Ch. 3.5 - Beginning from rest when , a 35-kg child slides...Ch. 3.5 - A small coin is placed on the horizontal surface...Ch. 3.5 - The rotating drum of a clothes dryer is shown in...Ch. 3.5 - Prob. 87PCh. 3.5 - Prob. 88PCh. 3.5 - Prob. 89PCh. 3.5 - Prob. 90PCh. 3.5 - Prob. 91PCh. 3.5 - Prob. 92PCh. 3.5 - Prob. 93PCh. 3.5 - The slotted arm OB rotates in a horizontal plane...Ch. 3.5 - Prob. 95PCh. 3.5 - Prob. 96PCh. 3.6 - The spring is unstretched at the position x = 0....Ch. 3.6 - Prob. 98PCh. 3.6 - Prob. 99PCh. 3.6 - Prob. 100PCh. 3.6 - Prob. 101PCh. 3.6 - The small 0.1-kg slider enters the “loop-the-loop”...Ch. 3.6 - Prob. 103PCh. 3.6 - Prob. 104PCh. 3.6 - Prob. 105PCh. 3.6 - Prob. 106PCh. 3.6 - Prob. 107PCh. 3.6 - Prob. 108PCh. 3.6 - Prob. 109PCh. 3.6 - Prob. 110PCh. 3.6 - Prob. 111PCh. 3.6 - Prob. 112PCh. 3.6 - Prob. 113PCh. 3.6 - Prob. 114PCh. 3.6 - Prob. 115PCh. 3.6 - Prob. 116PCh. 3.6 - Prob. 117PCh. 3.6 - Prob. 118PCh. 3.6 - Prob. 119PCh. 3.6 - Prob. 120PCh. 3.6 - Prob. 121PCh. 3.6 - Prob. 122PCh. 3.6 - Prob. 123PCh. 3.6 - Prob. 124PCh. 3.6 - Two 425,000-lb locomotives pull fifty 200,000-lb...Ch. 3.6 - Prob. 126PCh. 3.6 - Prob. 127PCh. 3.6 - Prob. 128PCh. 3.6 - Prob. 129PCh. 3.6 - The system is released from rest with no slack in...Ch. 3.6 - Prob. 131PCh. 3.6 - Prob. 132PCh. 3.6 - Prob. 133PCh. 3.6 - Prob. 134PCh. 3.6 - The 6-kg cylinder is released from rest in the...Ch. 3.6 - Prob. 136PCh. 3.6 - Extensive testing of an experimental 2000-lb...Ch. 3.6 - The vertical motion of the 50-lb block is...Ch. 3.7 - Prob. 139PCh. 3.7 - Prob. 140PCh. 3.7 - Prob. 141PCh. 3.7 - Prob. 142PCh. 3.7 - Prob. 143PCh. 3.7 - Prob. 144PCh. 3.7 - Prob. 145PCh. 3.7 - Prob. 146PCh. 3.7 - Prob. 147PCh. 3.7 - Prob. 148PCh. 3.7 - The particle of mass m = 1.2 kg is attached to the...Ch. 3.7 - The 10-kg collar slides on the smooth vertical rod...Ch. 3.7 - The system is released from rest with the spring...Ch. 3.7 - The two wheels consisting of hoops and spokes of...Ch. 3.7 - Prob. 154PCh. 3.7 - The two 1.5-kg spheres are released from rest and...Ch. 3.7 - Prob. 156PCh. 3.7 - Prob. 157PCh. 3.7 - Prob. 158PCh. 3.7 - The small bodies A and B each of mass m are...Ch. 3.7 - Prob. 160PCh. 3.7 - Prob. 161PCh. 3.7 - Prob. 162PCh. 3.7 - Prob. 163PCh. 3.7 - A satellite is put into an elliptical orbit around...Ch. 3.7 - Prob. 165PCh. 3.7 - Prob. 166PCh. 3.7 - Prob. 167PCh. 3.7 - Prob. 168PCh. 3.7 - Prob. 169PCh. 3.7 - Prob. 170PCh. 3.7 - Prob. 171PCh. 3.7 - Prob. 172PCh. 3.9 - A 0.2-kg wad of clay is released from rest and...Ch. 3.9 - Prob. 174PCh. 3.9 - Prob. 175PCh. 3.9 - Prob. 176PCh. 3.9 - Prob. 177PCh. 3.9 - Prob. 178PCh. 3.9 - Careful measurements made during the impact of the...Ch. 3.9 - Prob. 180PCh. 3.9 - Prob. 181PCh. 3.9 - Prob. 182PCh. 3.9 - Crate A is traveling down the incline with a speed...Ch. 3.9 - The 15 200-kg lunar lander is descending onto the...Ch. 3.9 - A boy weighing 100 lb runs and jumps on his 20-lb...Ch. 3.9 - The snowboarder is traveling with a velocity of 6...Ch. 3.9 - Prob. 187PCh. 3.9 - Prob. 188PCh. 3.9 - Prob. 189PCh. 3.9 - Prob. 190PCh. 3.9 - Prob. 191PCh. 3.9 - Prob. 192PCh. 3.9 - Prob. 193PCh. 3.9 - Prob. 194PCh. 3.9 - All elements of the previous problem remain...Ch. 3.9 - Prob. 196PCh. 3.9 - Prob. 197PCh. 3.9 - Prob. 198PCh. 3.9 - The hydraulic braking system for the truck and...Ch. 3.9 - The 100-lb block is stationary at time t = 0, and...Ch. 3.9 - Prob. 201PCh. 3.9 - Prob. 202PCh. 3.9 - Prob. 203PCh. 3.9 - Prob. 204PCh. 3.9 - Prob. 205PCh. 3.9 - Prob. 206PCh. 3.9 - Prob. 207PCh. 3.9 - The 1.2-lb sphere is moving in the horizontal x-y...Ch. 3.9 - Prob. 209PCh. 3.9 - A tennis player strikes the tennis ball with her...Ch. 3.9 - Prob. 211PCh. 3.9 - Prob. 212PCh. 3.9 - Prob. 213PCh. 3.9 - Prob. 214PCh. 3.10 - Determine the magnitude HO of the angular momentum...Ch. 3.10 - Prob. 216PCh. 3.10 - Prob. 217PCh. 3.10 - Prob. 218PCh. 3.10 - Prob. 219PCh. 3.10 - Prob. 220PCh. 3.10 - Prob. 221PCh. 3.10 - Prob. 222PCh. 3.10 - Prob. 223PCh. 3.10 - Prob. 224PCh. 3.10 - Prob. 225PCh. 3.10 - Prob. 226PCh. 3.10 - Prob. 227PCh. 3.10 - Prob. 228PCh. 3.10 - Prob. 229PCh. 3.10 - Prob. 230PCh. 3.10 - A wad of clay of mass m1 with an initial...Ch. 3.10 - Prob. 232PCh. 3.10 - Prob. 233PCh. 3.10 - A particle moves on the inside surface of a smooth...Ch. 3.10 - Prob. 235PCh. 3.10 - Prob. 236PCh. 3.10 - Prob. 237PCh. 3.10 - Prob. 238PCh. 3.10 - Prob. 239PCh. 3.10 - Prob. 240PCh. 3.12 - Prob. 241PCh. 3.12 - Compute the final velocities v1′ and v2′ after...Ch. 3.12 - Prob. 243PCh. 3.12 - Prob. 244PCh. 3.12 - Prob. 245PCh. 3.12 - Prob. 246PCh. 3.12 - Prob. 247PCh. 3.12 - Prob. 248PCh. 3.12 - Prob. 249PCh. 3.12 - If the center of the ping-pong ball is to clear...Ch. 3.12 - Prob. 251PCh. 3.12 - Prob. 252PCh. 3.12 - Prob. 253PCh. 3.12 - Prob. 254PCh. 3.12 - Prob. 255PCh. 3.12 - A 0.1-kg meteor and a 1000-kg spacecraft have the...Ch. 3.12 - In a pool game the cue ball A must strike the...Ch. 3.12 - Prob. 258PCh. 3.12 - Prob. 259PCh. 3.12 - Prob. 260PCh. 3.12 - Prob. 261PCh. 3.12 - Prob. 262PCh. 3.12 - Prob. 263PCh. 3.12 - Prob. 264PCh. 3.12 - Prob. 265PCh. 3.12 - Prob. 266PCh. 3.12 - The 2-kg sphere is projected horizontally with a...Ch. 3.12 - Prob. 268PCh. 3.12 - Prob. 269PCh. 3.12 - Prob. 270PCh. 3.12 - Prob. 271PCh. 3.12 - Prob. 272PCh. 3.12 - Prob. 273PCh. 3.12 - Prob. 274PCh. 3.12 - Prob. 275PCh. 3.12 - Prob. 276PCh. 3.12 - Prob. 277PCh. 3.12 - Prob. 278PCh. 3.12 - Determine the speed v required of an earth...Ch. 3.12 - Prob. 280PCh. 3.12 - Prob. 281PCh. 3.12 - Prob. 282PCh. 3.12 - Prob. 283PCh. 3.12 - Prob. 284PCh. 3.12 - Prob. 285PCh. 3.12 - Compute the magnitude of the necessary launch...Ch. 3.12 - Prob. 287PCh. 3.12 - Prob. 288PCh. 3.12 - Prob. 289PCh. 3.12 - Prob. 290PCh. 3.12 - Prob. 291PCh. 3.12 - Prob. 292PCh. 3.12 - The perigee and apogee altitudes above the surface...Ch. 3.12 - Prob. 294PCh. 3.12 - Prob. 295PCh. 3.12 - Prob. 296PCh. 3.12 - Prob. 297PCh. 3.12 - Prob. 298PCh. 3.12 - Prob. 299PCh. 3.12 - Prob. 300PCh. 3.15 - Prob. 301RPCh. 3.15 - Prob. 302RPCh. 3.15 - Prob. 303RPCh. 3.15 - Prob. 304RPCh. 3.15 - Prob. 305RPCh. 3.15 - Prob. 306RPCh. 3.15 - Prob. 307RPCh. 3.15 - Prob. 308RPCh. 3.15 - Prob. 309RPCh. 3.15 - The slider A has a mass of 2 kg and moves with...Ch. 3.15 - Prob. 311RPCh. 3.15 - Prob. 312RPCh. 3.15 - Prob. 313RPCh. 3.15 - Prob. 314RPCh. 3.15 - A ball is released from rest relative to the...Ch. 3.15 - The small slider A moves with negligible friction...Ch. 3.15 - Prob. 317RPCh. 3.15 - Prob. 318RPCh. 3.15 - Prob. 319RPCh. 3.15 - Prob. 320RPCh. 3.15 - Prob. 321RPCh. 3.15 - The simple 2-kg pendulum is released from rest in...Ch. 3.15 - Prob. 323RPCh. 3.15 - Prob. 324RPCh. 3.15 - Prob. 325RPCh. 3.15 - Prob. 326RPCh. 3.15 - Prob. 327RPCh. 3.15 - Six identical spheres are arranged as shown in the...Ch. 3.15 - Prob. 329RPCh. 3.15 - Prob. 330RPCh. 3.15 - Prob. 331RPCh. 3.15 - Prob. 332RPCh. 3.15 - Prob. 333RPCh. 3.15 - Prob. 334RPCh. 3.15 - Prob. 335RPCh. 3.15 - Prob. 336RPCh. 3.15 - Prob. 337RPCh. 3.15 - Prob. 338RPCh. 3.15 - Prob. 339RPCh. 3.15 - The bungee jumper, an 80-kg man, falls from the...Ch. 3.15 - Prob. 341RPCh. 3.15 - Prob. 342RPCh. 3.15 - Prob. 343RPCh. 3.15 - Prob. 344RPCh. 3.15 - Prob. 345RPCh. 3.15 - Prob. 346RPCh. 3.15 - Prob. 347RPCh. 3.15 - Prob. 348RPCh. 3.15 - Prob. 349RPCh. 3.15 - Prob. 350RPCh. 3.15 - The tennis player practices by hitting the ball...Ch. 3.15 - A particle of mass m is introduced with zero...Ch. 3.15 - The system of Prob. 3/166 is repeated here. The...
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