13-129. The rocket is traveling in a free flight along anelliptical trajectory A'A. The planet has no atmosphere, andits mass is 0.60 times that of the earth. If the rocket has theorbit shown, determine the rocket's velocity when it is atpoint A.13–130. If the rocket is to land on the surface of the planet,determine the required free-flight speed it must have at Aso that the landing occurs at B. How long does it take forthe rocket to land, going from A' to B? The planet has noatmosphere, and its mass is 0.6 times that of the earth.r = 6 MmA'-100 Mm70 Mm

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Answered: 13-129. The rocket is traveling in 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 rocket is traveling in a free flight along an elliptical trajectory A′A and the rocket has the orbit shown. Suppose that r = 6 Mm , ra = 110 Mm , and rp = 50 Mm . The planet has no atmosphere, and its mass is 0.6 times that of the earth. (Figure 1) Determine the rocket's velocity when it is at point A
Q17. 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° 02
The 0.7 lblb ball is shot from the spring device shown Determine the smallest stiffness k which is required to shoot the ball a maximum distance of 31 in. up the smooth plane after the spring is pushed back 3 in . and the ball is released from rest. The four cords C and plate P keep the spring compressed 2 in. when no load is on the plate.
The 4-kg collar C has a velocity of ?? = 2?/? when it is at A. If the guide rod is smooth, draw a free body diagram and determine the speed of the collar when it is at B. The spring has an unstretched length of ?o =0.2?
The ball with a mass of 5 kg is attached to the rod (with negligible mass), which rotates about O in the horizontal plane. A couple moment M = 0.5 t2 N-m is applied to the system, where t is in seconds. Determine the speed of the ball at the instant t = 10 s starting from rest.
The rocket is in a free-flight elliptical orbit about the earth such that e = 0.76 as shown. Determine its speed when it is at point A. Also determine the sudden change in speed the rocket must experience at B in order to travel in free flight along the orbit indicated by the dashed path. B 9 Mm -8 Mm 5 Mm
The 0.31-kg mass slides on a frictionless wire that lies in the vertical plane. The spring attached to the mass has a free length of 80 mm and stiffness of 0.13 N/mm. Calculate the smallest value of the distance b so that the mass will reach the end of the wire at B after being released from rest at A.
2) The collar has a mass of 2 kg and is attached to the light spring, which has a stiffness of 30 N/m and an unstretched length of 1.5 m. The collar is released from rest at A and slides up the smooth rod under the action of the constant 50-N force. Calculate the velocity u of the collar as it passes position B. Ans. V=4.93 m m 1.5 m 30° 50 N k= 30 N/m 2m 3
When 0=60°, the boy's center of mass G has a speed of 10 ft/s as he swings to the right. Determine the rate of increase in his speed and the tension in each of the two supporting cords of the swing at that instant. The boy has a weight of 60 lb. 10 í
The 214000-lb space-shuttle orbiter touches down at about 222 mi/hr. At 182 mi/hr its drag parachute deploys. At 40 mi/hr, the chute is jettisoned from the orbiter. If the deceleration in feet per second squared during the time that the chute is deployed is -0.000200v2 (speed v in feet per second), determine the corresponding distance s traveled by the orbiter. Assume no braking from its wheel brakes. Answer: s = i ft

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