18-13. The 20-lb block is moving to the right on ahorizontal plane with a velocity of 4 ft/sec when it isacted upon by the horizontal force F = 2e-t, where Fis in pounds and t in seconds. Determine the velocityof the block after the force acts for 2 sec. The force actsin the constant direction shown in the figure.V₁ = 4 ft/secneOC-BSProb. 18-1345°ne45°ofisFticالكل الأنواعتحويلتعليق بالرسمالحقول المطل.... التوضيحيقم بملءتحرير>9:EV

First, we need to find the acceleration of the block by integrating the force function with respect…

Answered: 18-13. The 20-lb block is moving to the…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The cart is moving down the incline with a velocity vo = 15 m/s at t = 0 , at which time the force P begins to act P, N as shown. After 5 seconds the force continues at the 50 N level. Parabolie 50 Determine: 1. the velocity of the cart at time t = 7 s. 2. The time t at which the cart velocity is zero Dg = 20 m/s 6 kg 15°
13-89: Rod OA rotates counterclockwise with a constant angular velocity of = 5 rad/s. The double collar B is pin connected together such that one collar slides over the rotating rod and the other slides over the horizontal curved rod, of which the shape is described by the equation r= 1.5(2-cose) ft. If both collars weigh 0.75 lb, determine the normal force which the curved rod exerts on one collar at the instant 0 = 120°. Neglect friction. B r = 1.5 (2 cos 0) ft 6 = 5 rad/s
Rod OA rotates counterclockwise at a constant angular rate 0 = 4 rad/s. The double collar Bis pin-connected together such that Determine the magnitude of the force which the circular rod exerts on one of the collars at the instant 0 = 45°. one collar slides over the rotating rod and the other collar slides over the circular rod described by the equation r = (1.6 cos 0) m Both collars have a mass of 0.65 kg. Motion is in the vertical plane. (Figure 1) Express your answer to three significant figures and include the appropriate units. HA ? F = - 11.766 Figure 1 of 1 Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining r = 1.6 cos 0 0 = 4 rad/s B Part B Determine the magnitude of the force that OA exerts on the other collar at the instant 0 = 45°. Express your answer to three significant figures and include the appropriate units. 0.8 m HẢ ? FOA = 11.766
The 1.334-Mg car is traveling along the curved road described by r = (50e28) m, where 0 is in radians. If a camera is located at A and it rotates with an angular velocity of Ó = 0.083 rad/s and an angular acceleration of ö = 0.304 rad/s? at the instant 0 = 0.879 rad, .determine the resultant friction force developed between the tires and the road at this instant %3D r= (50")m
17-A12 The wagon and load have a mass of 300-kg. No friction at A or B. The wheels are small and have no mass. If P= 2000 N, what are the acceleration and normal forces at A and B? Determine the maximum force P that can be applied such that all of the wheels stay on the ground. (You may solve the problem by summing moments about G or about B. You should practice both ways.) • What is the maximum acceleration? 0.5 m G. 0.2 m 0.3 m 0.2 m- 0.4 m
The quarter-circular slotted arm OA is rotating about a horizontal axis through point O with a constant counterclockwise angular velocity2=5.7 rad /sec. The 0.19-lb particle Pis epoxied to the arm at the position 3-56º. Determine the magnitude of the tangential force F parallel to the slot which the epoxy must support so that the particle does not move along the slot. The value of R-1.1 ft. B 22 R P
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*13-88. Rod OA rotates counterclockwise with a constant angular velocity of ở = 5 rad/s. The double collar B is pin- connected together such that one collar slides over the rotating rod and the other slides over the horizontal curved rod, of which the shape is described by the equation r = 1.5(2 – cos 0) ft. If both collars weigh 0.75 lb, determine the normal force which the curved rod exerts on one collar at the instant 0 = 120°. Neglect friction. B. ở = 5 rad/s r= 1.5 (2 – cos 0) ft
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*15-108. When the 2-kg bob is given a horizontal speed o: 1.5 m/s, it begins to move around the horizontal circular path A. If the force F on the cord is increased, the bob rises and then moves around the horizontal circular path B Determine the speed of the bob around path B. Also, finc the work done by force F. 300 mm 600 mm
The 100-kg beam BD shown in Fig.17-13a is supported by two rods having negligible mass. Determine the force developed in each rod if at the instant = 30°, w = 6 rad/s. A 0.5 m -0 = 30° B 0.4 m- co G 0.4 m n (G) ► (ac)₁ TB 30° 30° 4 0.4 m -0.4 m 981 N TD 30° (b) Alo 0.5 m al α (c) w = 6 rad/s a B

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