EBK ENGINEERING MECHANICS
15th Edition
ISBN: 9780137616909
Author: HIBBELER
Publisher: VST
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Chapter 14, Problem 27P
To determine
The speed of the car at
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Parvinbhai
The lower block of mass m2 = 3.2 kg is pulled on by a rope with a tension force of 28 N. The upper block has mass m1 = 1.8 kg. The coefficient of kinetic friction between the lower block and the surface is 0.32. The coefficient of kinetic friction between the lower block and the upper block is also 0.32. What is the acceleration of the 3.2 kg block?
Chapter 14 Solutions
EBK ENGINEERING MECHANICS
Ch. 14 - Prob. 1FPCh. 14 - If the motor exerts a constant force of 300 N on...Ch. 14 - If the motor exerts a force of F = (600 + 2s2) N...Ch. 14 - The 1.8-Mg dragster is traveling at 125 m/s when...Ch. 14 - When s = 0.5 m, the spring is unstretched and the...Ch. 14 - The 5-lb collar is pulled by a cord that passes...Ch. 14 - Prob. 2PCh. 14 - The 100-kg crate is subjected to the forces shown....Ch. 14 - Determine the required height h of the roller...Ch. 14 - When the driver applies the brakes of a light...
Ch. 14 - Prob. 7PCh. 14 - The force F, acting in a constant direction on the...Ch. 14 - The 2-lb brick slides down a smooth roof, such...Ch. 14 - The two blocks A and B have weights WA = 60 lb and...Ch. 14 - A small box of mass m is given a speed of v=14gr...Ch. 14 - Prob. 18PCh. 14 - If the cord is subjected to a constant force of F=...Ch. 14 - The crash cushion for a highway barrier consists...Ch. 14 - The 25-lb block has an initial speed of v0 = 10...Ch. 14 - At a given instant the 10-lb block A is moving...Ch. 14 - Prob. 25PCh. 14 - The catapulting mechanism is used to propel the...Ch. 14 - Prob. 27PCh. 14 - Prob. 31PCh. 14 - When the 150-lb skier is at point A he has a speed...Ch. 14 - Prob. 39PCh. 14 - Prob. 40PCh. 14 - If the contact surface between the 20-kg block and...Ch. 14 - Prob. 8FPCh. 14 - Prob. 9FPCh. 14 - Prob. 10FPCh. 14 - Prob. 11FPCh. 14 - Prob. 12FPCh. 14 - The jeep has a weight of 2500 lb and an engine...Ch. 14 - Determine the power Input for a motor necessary to...Ch. 14 - An automobile having a mass of 2 Mg travels up a 7...Ch. 14 - Prob. 45PCh. 14 - To dramatize the loss of energy in an automobile,...Ch. 14 - Escalator steps move with a constant speed of 0.6...Ch. 14 - Prob. 48PCh. 14 - The 1000-lb elevator is hoisted by the pulley...Ch. 14 - The sports car has a mass of 2.3 Mg, and while it...Ch. 14 - Prob. 54PCh. 14 - Prob. 55PCh. 14 - The 50-lb block rests on the rough surface for...Ch. 14 - The 2-kg pendulum bob is released from rest when...Ch. 14 - Prob. 14FPCh. 14 - Prob. 15FPCh. 14 - Prob. 16FPCh. 14 - The 75-lb block is released from rest 5 ft above...Ch. 14 - Prob. 18FPCh. 14 - The girl has a mass of 40 kg and center of mass at...Ch. 14 - The 30-lb block A is placed on top of two nested...Ch. 14 - The 5-kg collar has a velocity of 5 m/s to the...Ch. 14 - The 5-kg collar has a velocity of 5 m/s to the...Ch. 14 - Prob. 71PCh. 14 - The roller coaster car has a mass of 700 kg,...Ch. 14 - The roller coaster car has a mass of 700 kg,...Ch. 14 - Prob. 76PCh. 14 - The roller coaster car having a mass m is released...Ch. 14 - The spring has a stiffness k = 200 N/m and an...Ch. 14 - Prob. 79PCh. 14 - Prob. 80PCh. 14 - When s = 0, the spring on the firing mechanism is...Ch. 14 - If the mass of the earth is Me, show that the...Ch. 14 - A rocket of mass m is fired vertically from the...Ch. 14 - The 4-kg smooth collar has a speed of 3 m/s when...Ch. 14 - Prob. 85PCh. 14 - Prob. 87PCh. 14 - Prob. 90PCh. 14 - The roller coaster car has a speed of 15 ft/s when...Ch. 14 - Prob. 1RPCh. 14 - The small 2-lb collar starting from rest at A...Ch. 14 - Prob. 3RPCh. 14 - Prob. 4RPCh. 14 - Prob. 5RPCh. 14 - Prob. 6RPCh. 14 - Prob. 7RPCh. 14 - Prob. 8RP
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- Hi, I only need part d, thank you.arrow_forwardQuestion 2 A car has a mass of 4 Mg and the center of mass at G = 400mm from the ground. The front wheels are 1.3 m and rear wheels are 0.8 m from the centre of gravity. Coefficient of kinetic friction between the wheels and the road is 0.2. Determine the acceleration if the rear driving wheels are always slipping and the front wheels are free to rotate. Neglect the mass of the wheels.arrow_forwardPart A The arm is rotating at a rate of 0 = 4 rad/s when 6 = 3 rad/s and 0 = 180°. It is confined to move along the slotted path. Motion occurs in the horizontal plane. (Figure 1) Determine the force it must exert on the 0.25-kg smooth cylinder. Express your answer to three significant figures and include the appropriate units. ? F = Value Units Submit Request Answer Provide Feedback Figure <) 1 of 1 e = 4 rad/s, ö = 3 rad/s e = 180° ) marrow_forward
- On a sloping road, the driver of the 1.3-tonne car, with an almost constant 300 N thrust from its engine, brakes at point A while driving at 90 km/h.a- Calculate the kinetic friction coefficient of the road to stop by traveling 50 m.b- Calculate the stopping distance (using the kinetic friction coefficient you found in part a) when you apply the brakes while going downhill at the same speed from B to A.arrow_forwardA brake test for an automobile is conducted. During the brake test, the automobile of mass 1800 kg (including driver) is travelling at the speed of 110 km/hr as it passes point A, and the car descends a hill of 1in 2 (Sine). The driver applies brakes so as to bring the car speed at B to 50 km/hr. The total frictional resistance to motion is 235 N. Using Work-Energy Method, Calculate the following required to bring the car to 50 km/hr from 110 km/hr in 210 m (From Point A to Point B) B Determine the Value of Total Energy about Point A TE= Determine the Value of Total Energy about Point B TEb= Determine the Value of Breaking Force needed Fb= N Aarrow_forwardProblem 1 The 2 blocks are originally at rest. The pulleys are smooth. The coefficient of friction between the block A and the incline are us = 0.35 and uK = 0.32. The mass of the blocks are ma = 50kg and MB = 80kg and the angle of the slope a = 35 degrees. %3D A 1. Find the relation between the acceleration of the block A and the block B 2. Do FBD and kinetic diagram of both blocks. 3. Solve for both accelerations, what is the direction of the motion? 4. Find the tension in the cable.arrow_forward
- Q1. m-1 kg m,=4 kg The mechanism set up with m,, m, and weightless pulleys is as shown in the figure. Then, the masses are released. Static and kinetic friction between the inclined plane and m, are 0.6 and 0.5 respectively. What are the accelerations of m, and m,? (g = 10 m / s². Frictions and mass of the pulley are ignored.) Q2. 300 m/s .*........ yatay 100 m/s 320 m x=? A plane is flying horizontally at an altitude of 320 m with 300 m/s speed. It launches its bomb with 100 m/s speed relative to the plane as shown. How many meters away from the castle should the plane launch its bomb to hit the castle. (g=10 m/s², sin370=0.6; cos37°=0.8) Q3. 2 kg The object in the frictionless cone in the figure is making a uniform circular motion. Calculate, a) the normal force that the cone exerts on the object, b) centripetal force applied to the body, c) Find the speed of the object.arrow_forwardParvinbhaiarrow_forward11. Box A (mass 50 kg) and box B (mass 200 kg) shown in Figure 9 are released from rest. Here the mass of pulleys is ignored. The coefficient of copper friction between box A and box B is 0.1, the coefficient of copper friction between box B and slope is 0.2, and the angle of slope is 20 degrees. Answer each of the following questions.1) Calculate the acceleration (m/s^2) of box A.2) Find the tension size (lb).3) If box A and box B are obtained when box B moves 1.0m, explain why it is not possible to apply the Principle of Work & Energy to the entire box A, box B and pulley system, and obtain the speed (m/s) of box A and box B when box B moves 1.0m down.4) When box B moves 2m, calculate the speed (m/s) of box A using the Modified energy supply law.arrow_forward
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