The superheroine Xanaxa, with a mass of 69.9 kg, is in a hair-raising chase after the 72.7-kg arch-villainLexlax. She leaps from the ground to the top of a 195-m-high building, then dives off and comes to rest atthe bottom of a 15.7-m-deep excavation, where she finds Lexlax and neutralizes him. Does all this bringabout a net gain or a net loss of gravitational potential energy?GainLossBy how much? Answer with a positive number. Take g = 9.81 m/s?.NumberJ

Given: m=69.9 kg m'=72.7 kg g=9.81 N h=15.7 m

Answered: The superheroine Xanaxa, with a mass of…

Similar questions

Calculate the final velocity right after a 116 kg rugby player who is initially running at 7.85 m/s collides head‑on with a padded goalpost and experiences a backward force of 17700 for 5.50×10^−2 s. what is the final velocity in m/s?
A 0.2 kg softball is thrown straight up with an initial speed of 9 m/s. How high in meters does it go? Round to two significant figures.
Calculate the increase in velocity (in m/s) of a 4810 kg space probe that expels 3210 kg of its mass at an exhaust velocity of 4.00 ✕ 103 m/s. You may assume the gravitational force is negligible at the probe's location. The answer is 4400 m/s given by the homework website I tried using the conservation of momentum and the conservation of kinetic energy but did not get the right answer.
Calculate the final speed (in m/s) of a 100 kg rugby player who is initially running at 7.50 m/s but collides head-on with a padded goalpost and experiences a backward force of 1.65 x 10* N for 7.50 x 10 -2 S. m/s
From 1946 through 1958, Col. John Stapp headed the U.S. Air Force Aero Medical Laboratory's studies of the human body's ability to tolerate high accelerations during plane crashes. Conventional wisdom at the time indicated that a plane's negative acceleration should not exceed 180 m/s2 (18 times gravitational acceleration, or 18g). Stapp and his colleagues built a 700-kg "Gee Whiz" rocket sled, track, and stopping pistons to measure human tolerance to high acceleration. Starting in June 1949, Stapp and other live subjects rode the sled. In one of Stapp's rides, the sled started at rest and 360 m later was traveling at speed 67 m/s when its braking system was applied, stopping the sled in 6.0 m. He had demonstrated that 18g was not a limit for human deceleration. Find the time interval for Stapp and his sled to stop as their speed decreased from 67 m/s to zero.
Flying Circus of Physics On August 10, 1972, a large meteorite skipped across the atmosphere above the western United States and western Canada, much like a stone skipped across water. The accompanying fireball was so bright that it could be seen in the daytime sky and was brighter than the usual meteorite trail. The meteorite's mass was about 3.7 × 106 kg; it's speed was about 14 km/s. Had it entered the atmosphere vertically, it would have hit Earth's surface with about the same speed. (a) Calculate the meteorite's loss of energy (as a positive number, in joules) that would have been associated with the vertical impact. (b) Express the energy as a multiple of the explosive energy of 1 megaton of TNT, which is 4.2 × 1015 J. (c) The energy associated with the atomic bomb explosion over Hiroshima was equivalent to 13 kilotons of TNT. To how many Hiroshima bombs would the meteorite impact have been equivalent? (a) Number (b) Number Units Units (c) Number Units
Calculate the final speed of a 110-kg rugby player who is initially running at 8.00 m/s but collides head-on with a padded goalpost and experiences a backward force of 1.76×104 N for 5.50×10-2 s .
A train engine’s mass is 22500 kg and is moving at 25 m/sec, and hits an empty train car with a mass of 7500 kg. What velocity would the empty train car have after impact? (no friction in this system, of course)
tolerance is 3 sig figs
I would appreciate some hwlp with this question. Thanks! A model rocket consisting of a 61.0-g chassis and a 30.5-g engine is taken on an interstellar mission and fired in outer space. The engine produces 5.00 N of thrust while expending 13.0 g of fuel at a constant rate during a 2.04-s burn. (Assume the mass of the engine includes the mass of the fuel.) (a) What is the average exhaust speed of this rocket's engine? (b) If the rocket starts from rest, what is its final velocity? (Assume the thrust to be in the positive direction. Indicate the direction with the sign of your answer.)