Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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If the rod of negligible mass is subjected to a couple moment of M = (30t^2) N⋅⋅m, and the engine of the car supplies a traction force of F = (15t) N to the wheels, where t is in seconds, determine the speed of the car at the instant t = 12.5 s. The car starts from rest. The total weight of the car and rider is 1.5 kN. Neglect the size of the car.
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- 4 m M = (301²) N.m F = 15t N If the rod of negligible mass is subjected to a couple moment of M=24t² N;M where t is the time in seconds, and the engine of the car supplies a braking force F= 15t N to the wheels, determine the speed of the car at t= 10s. The car at t=0s a a speed of 9 m/s. The total mass of the car and the driver is 135 kg. Neglect the size of the car.arrow_forwardAm = 12 kg particle is moving along a horizontal path defined by the equations r= (4.5.t+13) m and = = (4.5-t2-3) rad, where t is in seconds. Using equations of motion in cylindrical coordinates, a. Determine the radial force component at the instant t = 5 s, Fr. b. Determine the transverve force component at the instant t = 5 s, F. c. Determine the magnitude of the resultant force at the instant t = 5 s, FR Round your final answers to 3 significant digits/figures. Fr= Fe= FR = N N Narrow_forwardQ17. As shown in the image below, the 0.7-kg ball strikes the rough ground and rebounds. The directions of its velocities before and after the strike are shown. If the speeds are v₁ = 27 m/s and v₂ = 12 m/s, determine the magnitude of the impulse (in N.s) the ground exerts on the ball. Assume that the ball does not slip when it strikes the ground, and neglect the size of the ball and the impulse produced by the weight of the ball. Please pay attention: the numbers may change since they are randomized. Your answer must include 2 places after the decimal point. V₁ Your Answer: 45° Answer 30° 02arrow_forward
- The boy of mass 37 kg is sliding down the spiral slide at a constant speed such that his position, measured from the top of the chute, has components r = 1.5 m, 0 (0.7t) rad, and z = (-0.5t) m, where t is in seconds. Neglect the size of the boy. (Figure 1) Figure 1 of 1 r 1.5 m a Part A Determine the r, 0, z components of force F which the slide exerts on him at the instant t = 2 s using sca notation. Express your answers in newtons to three significant figures separated by commas. Fr. Fo. F= Submit Request Answer < Return to Assignment VAΣo↓ vec Submit Provide Feedback P Pearson ? Narrow_forwardAt the instant θ = 22 degrees, the 61 lb bob is momentarily at rest. Given that R=9.9 ft, answer the following: Determine the speed of the bob when θ = 67 degrees Determine the tension in the cord when θ = 67 degreesarrow_forwardThe 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 >arrow_forward
- The initially stationary 24-kg block is subjected to the time-varying force whose magnitude P is shown in the plot. Note that the force is zero for all times greater than 5 s. Determine the time t, at which the block comes to rest. P, N 24 kg 26° T Mk=0.43 Hg = 0.51 Answe: ts = i 173 S 5 t, sarrow_forward5. 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/marrow_forward
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