*12-200. Determine the constant speed at which the cableat A must be drawn in by the motor in order to hoist theload 6 m in 1.5 s.12-201. Starting from rest, the cable can be wound ontothe drum of the motor at a rate of va = (3²) m/s, where t isin seconds. Determine the time needed to lift the load 7 m.

Given Data: The pulley system is shown consists of one fixed pulley and two movable pulleys. The…

Answered: *12-200. Determine the constant speed…

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 motor, M, pulls on the cable with a force F = (101² + 300)N, where t is in seconds. If the 100 kg crate is originally at rest at 1 = 0, determine its speed when t = 4 s. Hint: First find the time needed to begin lifting the crate.
The pilot of a jet transport brings the engines to full takeoff power before releasing the brakes as the aircraft is standing on the runway. The jet thrust remains constant, and the aircraft has a near-constant acceleration of 0.39g. If the takeoff speed is 240 km/h, calculate the distance s and time t from rest to takeoff. Answers: S = i m t = S
*15-12. For a short period of time, the frictional driving force acting on the wheels of the 2.5-Mg van is Fp=(600²) N, where t is in seconds. If the van has a speed of 20 km/h when t=0, determine its speed when t=5 s. FD
Each of the cables can sustain a maximum tension of 5000 lb. The uniform beam has a weight of 4200 lb . a) Determine the shortest time possible to lift the beam with a speed of 10 ft/s starting from rest. t = ?
The 52 kg block is hoisted up the incline using the cable and motor arrangement shown. (Figure 1) Figure 2 m/s Part A The coefficient of kinetic friction between the block and the surface is = 0.4. If the block is initially moving up the plane at v0 = 2 m/s, and at this instant (t = 0) the motor develops a tension in the cord of T = (300+120√t) N, where t is in seconds, determine the velocity of the block when t = 4 s. Express your answer to three significant figures and include the appropriate units. v2 = Submit Value Provide Feedback A Request Answer → Ò Units ? Next >
Q15. As shown in the image below, the 17-kg crate is being hoisted by the motor. If at this instant shown the velocity of point P on the cable is vp = 2.6 m/s and the speed is increasing at 1.3 m/s², what is the power input supplied to the motor if its efficiency is e = 0.63? Please pay attention: the numbers may change since they are randomized. Your answer must include 1 place after the decimal point, and proper Sl unit. Take g = 9.81 m/s². Vp Your Answer: P Answer D A units
The 15-kg block is subjected to the force shown. Determine its velocity at s= 4m if v= 6 m/s at s=0. Motion occurs to the right. F= (5.1 s)N
5. The 8-kg smooth collar has a speed of 5 m/s when it is at s = 0. Determine the maximum distance s it travels before it stops momentarily. The spring has an unstretched length of 2 m. -1.5 m- -3 m/s k = 100 N/m
7

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