2. A rocket with a mass of 4000 lbm (1818.19 kg) travels at 27,000 ft/s (8229.6...
The kinetic energy of a rotating mass is given by [KE=1/2*I*omega^2] If I =6.50 lbm-ft2 and the angular velocity is ω =1260 rpm, determine the kinetic energy in ft-lbf.
4. Mass of Saturn V rocket used during the Apollo 11 mission was 2,380 metric ton (without fuel) on Earth. (a) What is the mass of Saturn V in USCS dimensions of slugs and lbm? (b) After separation from different stages of rocket, the mass of the Lunar Module was 15,103 kg before it landed on moon. What will be its weight in lbf. once it has landed on moon? The gravitational acceleration on the surface of moon is 5.33...
4) A ball with a mass of 0.15 kg has a velocity of 5 m/s. It strikes a wall perpendicularly and bounces off straight back with a velocity of 2 m/s. The ball underwent a change in momentum equal to (There is only one answer) (2p) A) 0.20 kg. m/s B) 1.20 kg. m/s C) 1.05 kg. m/s D) 6 kg. m/s E) 8.5 kg. m/s 5) A 2-kg mass moving with a velocity of 6 m/s collides elastically with...
A rocket with mass 4.00 times 10^3 kg is in a circular orbit of radius 7.10 times 10^8 m arcund the earth, The rocket's engines fire for a period of time to increase that radius to 8 80 times 10^6 m, with the orbit again circular, What is the change in the rocket's kinetic energy? Does the kinetic energy increase or decrease? Express your answer with the appropriate units. Enter positive value if the kinetic energy increases and negative value...
A1300-kg can travels at 22 m/s and then quickly stops in 3.6 s to avoid an obstacle What is the initial speed of the car in mph? mph Submit Answer Tries 0/2 What is the initial kinetic energy of the car in kilojoules (kJ)? kJ Submit Answer Tries 0/2 What is the initial momentum of the car? kg*m/s Submit Answer Tries 0/2 What is the magnitude of the impulse necessary to stop the car? kg*m/s Submit Answer Tries 0/2 What...
A ball of mass 1 kg is uniformly accelerated from rest and travels 12 m in 2 s. What is its final kinetic energy (in J) after 2 s? A: 72.0 B: 84.2 C: 98.6 D: 115 E: 135
A rocket with mass 5.00×103 kg is in a circular orbit of radius 7.30×106 m around the earth. The rocket's engines fire for a period of time to increase that radius to 8.70×106 m , with the orbit again circular. What is the change in the rocket's kinetic energy? Does the kinetic energy increase or decrease?
A 715-kg two-stage rocket is traveling at a speed of 6.80×103 m/s away from Earth when a predesigned explosion separates the rocket into two sections of equal mass that then move with a speed of 2.50×103 m/s relative to each other along the original line of motion. a.) What is the speed of each section (relative to Earth) after the explosion? Express your answers using three significant figures separated by a comma. b.) How much energy was supplied by the...
A rocket with a mass of 2.9×106 kg has a relativistic kinetic energy of 2.9×1023 J. Part A: How fast is the rocket moving? Part B: What is the rocket's total energy?
A rocket with a mass of 2.9×106 kg has a relativistic kinetic energy of 2.8×1023 J. A. What is the rocket's total energy?