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The 2-Mg truck is traveling at 15 m/s when the brakes on all its wheels are applied, causing it to skid for a distance of 10 m before coming to rest Determine the constant horizontal force developed in the coupling C, and the frictional force developed between the tires of the truck and the road during this time. The total mass of the boat and trailer is 1 Mg.
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Chapter 13 Solutions
Engineering Mechanics: Dynamics (14th Edition)
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INTERNATIONAL EDITION---Engineering Mechanics: Statics, 14th edition (SI unit)
- When the 5 kg block is 6 m from the wall, it is sliding at v1=14 m/s. If the coefficient of kinetic friction between the block and the horizontal plane is µk=0.3, determine the impulse of the wall on the block necessary to stop the block. Neglect the friction impulse action on the block during the collison.arrow_forwardThe 1.9-kg slider is released from rest in position A and slides without friction along the vertical-plane guide. Determine the normal force exerted by the guide on the slider (a) just before it passes point C, (b) just after it passes point C, and (c) just before it passes point E. The normal forces are positive if they point up and/or to the left, negative if they point down and/or to the right.arrow_forwardA train consists of a 5000 Kg engine and three cars, each having a mass of 3000 Kg. If it takes 10s for the train to increase its speed uniformly to 40 km/h, starting from rest, determine the force T developed at the coupling between the engine E and the first car A. The wheels of the engine provide a resultant frictional tractive force F which gives the train forward motion, whereas the car wheels roll freely. Also, determine F acting on the engine wheels.arrow_forward
- The van is traveling at 20 km/h when the coupling of the trailer at A fails. If the trailer has a mass of 300 kg and coasts 50 m before coming to rest, determine the constant horizontal force F created by rolling friction which causes the trailer to stop.arrow_forwardIf the 10-g bullet is traveling at 310 m/s when it becomes embedded in the 11-kg block, determine the distance the block will slide up along the plane before momentarily stopping.arrow_forwardThe 250-lb concrete block A is released from rest in the position shown and pulls the 400-lb log up the 30o ramp. If the coefficient of kinetic friction between the log and the ramp is 0.5, determine thevelocity of the block as it hits the ground at B.arrow_forward
- The 50-kg crate is hoisted up the 30o incline by the pulley system and motor M. If the crate starts from rest and by constant acceleration attains a speed of 6.4 m/s after traveling 18.1 m along the plane, determine the power in kW that must be supplied to the motor at this instant. Neglect friction along the plane. The motor has an efficiency ϵ = 0.78.arrow_forwardThe crate, which has a mass of 160 kg, is subjected to the action of the two forces. If it is originally at rest, determine the distance it slides in order to attain a speed of 7 m/s. The coefficient of kinetic friction between the crate and the surface is μk = 0.2.arrow_forwardThe collar of mass m is released from rest while in position A and subsequently travels with negligible friction along the vertical-plane circular guide. Determine the magnitude of the normal force exerted by the guide on the collar (a) just before the collar passes point B, (b) just after the collar passes point B (i.e., the collar is now on the curved portion of the guide), (c) as the collar passes point C, and (d) just before the collar passes point D. Use the values m = 0.5 kg, R = 1.0 m, and k = 290 N/m. The unstretched length of the spring is 0.70R.arrow_forward
- If blocks A and B of mass 10 kg and 6 kg respectively, are placed on the inclined plane and released, determine the force developed in the link. The coefficients of kinetic friction between the blocks and the inclined plane are mA = 0.1 and mB = 0.3. Neglect the mass of the link.arrow_forwardThe car has a mass m0 and is used to tow the smooth chain having a total length l and a mass per unit of length m. If the chain is originally piled up, determine the tractive force F that must be supplied by the rear wheels ofthe car, necessary to maintain a constant speed v while the chain is being drawn out.arrow_forwardThe 940-kg motorized unit A is designed to raise and lower the 445-kg bucket B of concrete. Determine the average force R which supports unit A during the 6.0 seconds required to slow the descent of the bucket from 3.1 m/s to 0.7 m/s. Analyze the entire system as a unit without finding the tension in the cable.arrow_forward
- International Edition---engineering Mechanics: St...Mechanical EngineeringISBN:9781305501607Author:Andrew Pytel And Jaan KiusalaasPublisher:CENGAGE L