Physics, 21.04.2020 17:34 alexmarto8467
1. While driving to Palm Desert you notice that some of the windmills near the freeway are spinning 20 times per minute. The length of a windmill blade is 36 m. If the windmill blade takes 50 spins to come to a stop: a. What is the magnitude of the rotational acceleration at the tip of a blade while it is slowing down? b. What is the magnitude of the rotational acceleration at the midpoint of the blade (r = 18 m)? Before you begin your calculations state whether you expect the answer to be larger or smaller and explain why. c. While the windmill spins at 20 times per minute, what is the centripetal acceleration of a repair person desperately holding on at the end of the blade? And at the halfway point? d. How would the centripetal acceleration at these two points change if the angular velocity of the blades were cut in half? First predict whether it will get larger or small and explain how you know, then do the calculation.
Answers: 1
Physics, 22.06.2019 11:20
If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s
Answers: 1
Physics, 22.06.2019 13:40
Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.
Answers: 2
Physics, 23.06.2019 00:00
A15,000 kg rocket traveling at +230 m/s turns on its engines. over a 6.0 s period it burns 1,000 kg of fuel. an observer on the ground measures the velocity of the expelled gases to be −1,200 m/s.
Answers: 3
1. While driving to Palm Desert you notice that some of the windmills near the freeway are spinning...
Biology, 09.09.2021 22:20
Mathematics, 09.09.2021 22:20
Business, 09.09.2021 22:20
History, 09.09.2021 22:20
Social Studies, 09.09.2021 22:20
Social Studies, 09.09.2021 22:20
Social Studies, 09.09.2021 22:20
English, 09.09.2021 22:20
English, 09.09.2021 22:20
Mathematics, 09.09.2021 22:20
History, 09.09.2021 22:20