At a concert, a rockstar with entirely too much money swings their guitar at the ground. Starting from rest, the guitar travels 1.25 m to the ground in 0.45 s, accelerating constantly the whole time (the guitar is held by the rockstar through the whole swing, so that the guitar is not in free-fall). How fast is the guitar moving just before hitting the ground?
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- At a concert, a rockstar with entirely too much money swings their guitar at the ground. Starting from rest, the guitar travels 1.25 m to the ground in 0.45 s, accelerating constantly the whole time (the guitar is held by the rockstar through the whole swing, so that the guitar is not in free-fall). How fast is the guitar moving just before hitting the ground?
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- Falcons are excellent fliers that can reach very high speeds by diving nearly straight down. To pull out of such a dive, a falcon extends its wings and flies through a circular arc that redirects its motion. The forces on the falcon that control its motion are its weight and an upward lift force—like an airplane—due to the air flowing over its wings. At the bottom of the arc, as shown, a falcon can easily achieve an acceleration of 15 m/s2. Suppose the falcon weighs 8.0 N and is turning with an acceleration of 15 m/s2 at the lowest point of the arc. What is the magnitude of the upward lift force at this instant?A. 8.0 N B. 12 NC. 16 N D. 20 NIn a laboratory test of tolerance for high acceleration, a pilot is swung in a circle 11.5 m in diameter. It is found that the pilot blacks out when he is spun at 30.6 rpm (rev/min). At what acceleration (in SI units) does the pilot black out? Express this acceleration in terms of a multiple of g. If you want to decrease the acceleration by 13.0% without changing the diameter of the circle, by what percent must you change the time for the pilot to make one circle? acceleration: acceleration as a multiple of g: percent of time change: m/s² %The SpaceX Falcon 9 Launch vehicle is launched straight up at a constant acceleration of 8 m/s?. At 10 seconds after liftoff, a bolt falls off the side of the Falcon 9. How much time later does the bolt hit the ground? 10 s 33 s 17 s 48 s 24 s 20 s O O O O