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Assuming that it is not limited by power available, what is the approximate maximum speed of the helicopter at 6,000 feet on a standard day?

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- A small block with mass m = 17 kg slides on a frictionless track from some initial height through a loop-the-loop with radius R = 6.9 m and then along a flat straight section at the height R/2 above the ground. Assume the block never leaves the smooth track at any point on its path and the track is frictionless What is the minimum speed the block must have at the top of the loop to make it around the loop-the-loop without leaving the track? At what height above the ground must the block begin from rest to make it around the loop-the-loop? It turns out that engineers who designed the loop-the-loop didn’t really know physics – when they made the ride, the initial height was only as high as the top of the loop-the- loop. To account for this honest mistake, they decided to give the block an initial velocity right at the beginning. How fast do they need to push the block at the beginning (now at a height equal to the top of the loop-the-loop) to get it around the loop-the-loop…C7 19.) You reach out the second story window, which is 5 m above the sidewalk, and throw a 0.5 kg ball straight upward with 2 J of kinetic energy. (a) What is the ball's gravitational potential energy when it is released?__________________________ J(b) What is the ball's gravitational potential energy just before hitting the sidewalk?___________________________ J(c) What is the ball's kinetic energy just before hitting the sidewalk?___________________________ J (d) How would the answer to part c change if the ball had initially been thrown straight down with 2 J of kinetic energy? A.) stay the same B.) decrease C.) increasePlease include solution. Thank you!
- A 70 kg secret agent skis down a hill and grabs a 200 kg bag then flies off a 12 m high cliff. The hill can be considered a 1/4 of a circle with a radius of 20 m. a) The initial mechanical energy of the agent at the top of the hill is 14,560 J relative to the location of the bag. If the average force of friction is 120 N determine the velocity of the agent before he picks up the bag. B) what is his apparent weight right before he picks up the bag? C) how fast is the agent traveling after he grabs a bag? D) how far from the base of the cliff does the agent land? Assume the resistance is negligible. E) Assume that the agent in his bag come to rest upon colliding with the ground at the base of the cliff. What is an impulse that he in the bag experiences? Estimate the resulting contact force on the agent. Discuss the likelihood of his living through the collision.1. The Hubble space telescope orbits the Earth at an altitude of approxi- mately 600 kilometers and has a mass of 1.11 × 104 kg. (a) be pulled down to the surface of the Earth. Ignoring all air resistance, determine the speed with which the telescope would impact the Earth. Use mgh as the gravitational potential energy, where m is the mass of the telescope, g = 9.81 m/s? (the acceleration due to gravity at the surface of the Earth), and h is the distance the Hubble space telescope were to come to an abrupt stop it would above the surface of the Earth. (b) gravitational potential energy, Ug = -GmM/r, where G is Newton's gravitational constant, m is the mass of the telescope, M is the mass of the Earth, and r is the distance from the center of the Earth to the Hubble telescope. Repeat the calculation from Part (a) using the actual expression for theA rock is attached to an end of a 0.80 m rope. You whirl the 2.0 kg rock in a circle while holding m the other end of the rope. If it moves at a constant speed of 6.0 -, what is the work done on S the rock for every revolution it makes? O 90 J zero 72 J O 16 J
- A toy plane with a mass of 0.85 kg is tied to a string and made to travel at a speed of 24 m/s in a horizontal circle with a 18 m radius. The person holding the string pulls the plane in, increasing the tension in the string, increasing the speed of the plane and decreasing the radius of the plane's orbit. ON Newtons (N) Scale records tension What is the net work done (in J) on the plane if the tension in the string increases by a factor of four and the radius decreases to 12 m. J13) What average mechanical power must a 65.0 kg mountain climber generate to climb to the summit of a hill of height 325 m in 45.0 min? Note: Due to inefficiencies in converting chemical energy to mechanical energy, the body calculated here is only a fraction of the power that must be produced by the climber's body. 14) A 50.0 kg child takes a ride on a Ferris wheel that rotates 5 times each minute and has a diameter of 18.0 m. What is the centripetal acceleration of the child? 5