Physics Question
Starting from rest, the final speed of a fire extinguisher-toy wagon rocket experiment is 10.5 m/s. The total mass is initially 34 kg and is 29.5 kg after the extinguisher is fired.
Calculate the exhaust speed, in meters per second, of the gases expelled from the extinguisher, assuming the speed is constant during the entire motion.
Homework Answers
SectionDef Additional Problems 59. A rocket is launched vertically from rest, and it bums fuel at...
SectionDef Additional Problems 59. A rocket is launched vertically from rest, and it bums fuel at a constant rate of 136 kg/s. Exhaust gases are expelled with a speed of 5 25 x 10 m/s relative to the rocket. What is the magnitude of the thrust? A) 7.14 x 10°N V=5.25x10mts B) 3.64 % 10N m = 136 kg/s C) 2.59 x 10-2N D) 808 N Thrust - ? E) 38.6 N Ans: A Difficulty: Medium SectionDef Additional Problems
Mastering Physics - Rocket Car
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1. The person in Fig. 1 weighs 90 kg and the mass of the wagon (excluding the rocks) is 100 kg. Initially there are 50 one-kg rocks in the wagon. At t 0 the person starts to throw rocks out the back of the wagon at the rate of 1 rock per second. If the rocks leave the person's hand at a speed of 30 m/s, plot the position, X, and velocity U, of the wagon for t-1 to 50...
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A rocket in outer space has a payload of 5055.6 kg and 1.542 . 105 kg...
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In the field below, discuss one other potentially questionable claim of the original story as reported...
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A 4.25-g bullet traveling horizontally with a velocity of magnitude 375 m/s is fired into a...
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SectionDef Additional Problems 59. A rocket is launched vertically from rest, and it bums fuel at a constant rate of 136 kg/s. Exhaust gases are expelled with a speed of 5 25 x 10 m/s relative to the rocket. What is the magnitude of the thrust? A) 7.14 x 10°N V=5.25x10mts B) 3.64 % 10N m = 136 kg/s C) 2.59 x 10-2N D) 808 N Thrust - ? E) 38.6 N Ans: A Difficulty: Medium SectionDef Additional Problems
1. The person in Fig. 1 weighs 90 kg and the mass of the wagon (excluding the rocks) is 100 kg. Initially there are 50 one-kg rocks in the wagon. At t 0 the person starts to throw rocks out the back of the wagon at the rate of 1 rock per second. If the rocks leave the person's hand at a speed of 30 m/s, plot the position, X, and velocity U, of the wagon for t-1 to 50...
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A rocket in outer space has a payload of 5055.6 kg and 1.542 . 105 kg of fuel. The rocket can expel propellant at a speed of 5.580 km/s. Assume that the rocket starts from rest, accelerates to its final velocity, and then begins its trip. How long will it take the rocket to travel a distance of 3.82. 103 km (approximately the distance between Earth and Moon)? Question A fire hose 4.54 cm in diameter is capable of spraying...
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