EP ENGR.MECH.-MOD.MASTERING ACCESS
15th Edition
ISBN: 9780134867267
Author: HIBBELER
Publisher: PEARSON CO
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Chapter 14, Problem 54P
To determine
The power supplied to the engine at the time
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Chapter 14 Solutions
EP ENGR.MECH.-MOD.MASTERING ACCESS
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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- On its takeoff roll, the airplane starts from rest and accelerates according to a = ao - kv² where ao is the constant acceleration resulting from the engine thrust and -kv² is the acceleration due to aerodynamic drag. If að = 1.6 m/s², k = 0.000039 m ¹, and vis in meters per second, determine the design length of runway required for the airplane to reach the takeoff speed of 271 km/h if the drag term is (a) excluded and (b) included. V0 = 0 Answers: (a) Excluding drag, s= i (a) Including drag, S= i v=271 km/h m 3arrow_forwardGiven a 1400 kg car traveling along a route with an increasing vertical profile y=0.0003x^2. Determine the x-component of the car's velocity (m/s) and the total force (kN) if the constant velocity is 30 m/s and the distance is 210m. Hint: A line's slope is equal to tan theta, where theta is an angle measured from the x-axis.arrow_forwardOn its takeoff roll, the airplane starts from rest and accelerates according to a = ao - kv² where ao is the constant acceleration resulting from the engine thrust and -kv² is the acceleration due to aerodynamic drag. If ao = 1.8 m/s², k = 0.000064 m ¹, and vis in meters per second, determine the design length of runway required for the airplane to reach the takeoff speed of 206 km/h if the drag term is (a) excluded and (b) included. Vo = 0 Answers: (a) Excluding drag, s= i (a) Including drag. S= i v= 206 km/h m marrow_forward
- The roller coaster car has a speed of VA = 36 ft/s when it is at the crest of a vertical parabolic track. The total weight of the car and the passengers is 350 lb. Neglect friction and the mass of the wheels. (Figure 1) Figure 200 ft AKKarrow_forwardA 7.8-Mg truck is resting on the deck of a barge which displaces 374 Mg and is at rest in still water. If the truck starts and drives toward the bow at a speed relative to the barge vrel = 5.6 km/h, calculate the speed v of the barge. The resistance to the motion of the barge through the water is negligible at low speeds. Vrel = 5.6 km/h 7.8 Mg %3D 374 Mg Answer: v = km/harrow_forwardThe 5kg block is placed on the 10kg block on a frictionless surface. While the 5kg block is tied to the wall with a rope, a 45N force is applied to the 10kg block to the right. Since the friction coefficient between the surfaces of the blocks is 0.2, find the tension on the rope and the acceleration of the 10kg block. (g = 10m / s ^ 2)arrow_forward
- A7.1-Mg truck is resting on the deck of a barge which displaces 398 Mg and is at rest in still water. If the truck starts and drives toward the bow at a speed relative to the barge Vrel = 4.4 km/h, calculate the speed v of the barge. The resistance to the motion of the barge through the water is negligible at low speeds. F'ed = 4.4 km/h 7.1 Mg 398 Mg- Answer: v = i km/harrow_forwardAn airplane has a mass of 25 Mg and its engines develop a total thrust of 40 kN during take-off. If the drag D exerted on the plane has a magnitude D= 2.25 v2, where is expressed in meters per second and D in newtons, and if the plane becomes airborne at a speed of 240 km/h, determine the length of runway required for the plane to take off.arrow_forwardDynamicsarrow_forward
- The jet is traveling at a speed of 500 mi/h, 30degrees with the horizontal If the fuel is being spent at 4 lb/s , and the engine takes in air at 410 lb/s , whereas the exhaust gas (air and fuel) has a relative speed of 32700 ft/s , determine the acceleration of the plane at this instant. The drag resistance of the air is FD=(0.7v2)lb, where the speed is measured in ft/s. The jet has a weight of 15000 lbarrow_forwardA braking system for an aircraft consists of 2 parachutes, each having a diameter of 3.75 m, deployed from the rear. If the aircraft has a mass of 14,500 kg and lands at 320 km/hr, determine the time and distance required to decelerate the aircraft to 100 km/hr. Assume brakes are not used and the drag of the aircraft is negligible.arrow_forwardThe elevator E and its freight have a total mass of 400kg. Hoisting is provided by the motor M and the 150-kg block C. If the motor has an efficiency of ε =0.85, determine the power that must be supplied to themotor when the elevator is hoisted upwards at aconstant speed of VE = 4 m/s. Please show every single step of the process and the free body diagrams thanksarrow_forward
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