12–149. The train passes point B with a speed of 20 m/swhich is decreasing at a, = - 0.5 m/s². Determine themagnitude of acceleration of the train at this point.12–150. The train passes point A with a speed of 30 m/sand begins to decrease its speed at a constant rate ofa,=- 0.25 m/s².Determine the magnitude of the accelerationof the train when it reaches point B, where sAB = 412 m.y = 200 e 1000Aх-400 m

As per the guidelines the first question will be answered. The given equation of the curve is…

Answered: 12–149. The train passes point B with a…

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 velocity of a point mass moving on a curve is v=21+ (2t +20). Determine the equation of the path if the position is 4i+75j at t=2s.. Determine the acceleration at x=0?
The roller coaster starts from rest at A, where xA = 59 mwith tangential acceleration (6 − 0.06 s) m/sec2. Determine the following at point B:a) sAB. [Hint: ds = √1 + y^2dx ] b) The horizontal and vertical components of the velocity.c) The horizontal and vertical components of acceleration.
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Q1.If the speed of the motorcycle is v=√(600-0.5s2) where s is in meters measured from A, determine its tangential velocity, tangential acceleration and normal acceleration when it reaches B. Clearly draw free body diagram and mention velocity and acceleration vectors along with their magnitudes and angles with positive t-axis. Where r = 60m and Ɵ is 30 degrees.
The particle travels along the path defined by the parabola y = 0.5x^2. If the component of velocity along the x axis is vx = (2t) m/s, where t is in seconds, determine the components of its acceleration when t = 1 s.
10(a) The x-coordinate of a particle in curvilinear motion is given by x = 4.4t3 - 4.9t where x is in feet and t is in seconds. The y-component of acceleration in feet per second squared is given by ay = 2.9t. If the particle has y-components y = 0 and vy = 3.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 6.0 sec. Sketch the path for the first 6.0 seconds of motion, and show the velocity and acceleration vectors for t = 6.0 sec.
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If the motorcycle has a deceleration of at = -(0.001s) m/s^2 and its speed at position A is 25 m/s, determine the magnitude of its acceleration when it passes point B

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