12-217. The block B is sus-pended from a cable that is at-tached to the block at E, wrapsaround three pulleys, and is tied tothe back of a truck. If the truckstarts from rest when ID is zero,and moves forward with a constantacceleration of ap = 0.5 m/s²,determine the speed of the block atDthe instant x = 2 m. Neglectthe size of the pulleys in the calcu-lation. When xƊ = 0, yc = 5 m,so that points C and D are at theProb. 12-2175 myc=2MXp

This question involving pulleys and a moving block. Let's analyze the question and solve it step by…

Answered: 12-217. The block B is sus- pended from…

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 mine car "C" is being pulled up the incline using the motor "M" and the "rope and puney arrangement shown. Determine the speed "vp" at which the point "P" on the cable must be traveling toward the motor to move the car up the plane with a constant speed of v= 5 m/s. M Ans. vp = 15 m/s
14-27. The "flying car" is a ride at an amusement park which consists of a car having wheels that roll along a track mounted inside a rotating drum. By design the car cannot fall off the track, however motion of the car is developed by applying the car's brake, thereby gripping the car to the track and allowing it to move with a constant speed of the track, v, = 3 m/s. If the rider applies the brake when going from B to A and then releases it at the top of the drum, A, so that the car coasts freely down along the track to B (0 = 7 rad), determine the speed of the car at B and the normal reaction which the drum exerts on the car at B. Neglect friction during the motion from A to B. The rider and car have a total mass of 250 kg and the center of mass of the car and rider moves along a circular path having a radius of 8 m. 8 m
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°
12-85. The flight path of the helicopter as it takes off from A is defined by the parametric equations x = (2P) m and y= (0.041) m, where t is the time in seconds. Determine the distance the helicopter is from point A and the magnitudes of its velocity and acceleration when t=10 s.
Parvinbhai
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12-121. The car passes point A with a speed of 25 m/s after which its speed is defined by v = (25 - 0.15s) m/s, where s is in meters. Determine the magnitude of the car's acceleration when it reaches point B, where 51.5 m and x = 50 m. 16 m y = 16 B 1 -x² 625 A S -X =
The horizontal force P = 40-10t N (t is the time measured in seconds) is applied to the 2- kg collar that slides along the inclined rod. 2 kg- -P = (40– 10r)N At time t = 0, the position coordinate of the collar is x = 0, and its velocity is vo = 3 m/s directed down the rod. Find the time T and the speed Sof the collar when it returns to the position x = 0 for the first time. Neglect friction.
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v/c P Mining cart C is pulled up the slope with motor M and the rope and pulley system shown. Determine the velocity vp of point P at which the cable is wound around the motor needed to move the car upward with a constant velocity of vc=15.1 m/s.
12-233. The football player at A throws the ball in the y-z plane with a speed va = 50 ft/s and an angle 04 =60° with the horizontal. At the instant the ball is thrown, the player is at B and is running at a constant speed of vg=23 ft/s along the line BC. Determine if he can reach point C, which has the same elevation as A, before the ball gets there. OA VB B. 20 ft 30 ft X.
12-19. A car is to be hoisted by elevator to the fourth floor of a parking garage, which is 48 ft above the ground. If the elevator can accelerate at 0.6 ft/s², decelerate at 0.3 ft/s², and reach a maximum speed of 8 ft/s, determine the shortest time to make the lift, starting from rest and ending at rest.

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