47. I| A ant riding on the top. The ball expn ant does not. What is the magnitude of the normal on the ant when the ball's speed is 2.0 m/s? 48. Il A 70 kg tightrope walker stands at the center of a rope. The Challe Tope supports are 10 m apart and the rope sags 10° at each end. The tightrope walker crouches down, then leaps straight up an acceleration of 8.0 m/s² to catch a passing trapeze. tension in the rope as he jumps? 53. I T with tens What is the the fric 49. I| Find an expression for the magnitude of the horizontal force F in FIGURE P7.49 for which m, does not slip either up or down along the wedge. All surfaces are frictionless. WE asino EA avall m2 FIGURE P7.49 bicunteadne 54. II 50. IL A rocket burns fuel at a rate of 5.0 kg/s, expelling the exhaust gases at a speed of 4.0 km/s relative to the rocket. We would like to find the thrust of the rocket engine. a. Model the fuel burning as a steady ejection of small pellets, each with the small mass Am. Suppose it takes a short time At т olda erate a pellet (at constant acceleration)

47. I| A ant riding on the top. The ball expn ant does not. What is the magnitude of the normal on the ant when the ball's speed is 2.0 m/s? 48. Il A 70 kg tightrope walker stands at the center of a rope. The Challe Tope supports are 10 m apart and the rope sags 10° at each end. The tightrope walker crouches down, then leaps straight up an acceleration of 8.0 m/s² to catch a passing trapeze. tension in the rope as he jumps? 53. I T with tens What is the the fric 49. I| Find an expression for the magnitude of the horizontal force F in FIGURE P7.49 for which m, does not slip either up or down along the wedge. All surfaces are frictionless. WE asino EA avall m2 FIGURE P7.49 bicunteadne 54. II 50. IL A rocket burns fuel at a rate of 5.0 kg/s, expelling the exhaust gases at a speed of 4.0 km/s relative to the rocket. We would like to find the thrust of the rocket engine. a. Model the fuel burning as a steady ejection of small pellets, each with the small mass Am. Suppose it takes a short time At т olda erate a pellet (at constant acceleration)

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter6: Applications Of Newton's Laws

Section: Chapter Questions

Problem 130CP: A large centrifuge, like the one shown below, is used to expose aspiring astronauts to accelerations...

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