Physics, 04.07.2020 18:01, malikbryant2002
A mass of 625 grams is attached to the end of a spring that is stretched 360 cm by a force of 25 N. At time t = 0 the mass is pulled 1 meters to the right, stretching the spring, and set in motion with an initial velocity of 3 m/s to the left. a. Enter the spring constant k. k = 125/18 b. Set up a differential equation that describes this system. Let x to denote the displacement, in meters, of the mass from its equilibrium position, and give your answer in terms of x, x', x" Assume that positive displacement means the mass is farther from the wall than when the system is at equilibrium. 3.6x"+(125/18) x=0 c. Find the resulting displacement x(t) of the mass in the form x(t) = A cos(omega t - delta), the amplitude and the period of the motion of the mass. (Give all of your answers in units of kg, m and s, and assume that there is no friction.) x(t) = amplitude = period =
Answers: 2
Physics, 22.06.2019 05:20, lea5261
Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.
Answers: 2
Physics, 22.06.2019 12:00, marquez8
You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?
Answers: 2
Physics, 22.06.2019 20:30, cupcake3103670
Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.
Answers: 1
A mass of 625 grams is attached to the end of a spring that is stretched 360 cm by a force of 25 N....
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