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The collar A slides on the vertical bar. At the instant shown, its coordinates are x=0.9 m, y=0.6m, and its velocity and acceleration are \(v=4j m/s\) and \(a=-9.81j m/s^2\) . Determine the velocity and acceleration of collar A in polar coordinates.
A 9.40kg projectile is fired vertically upward. Air drag decreases the mechanical energy of the projectile-Earth system by 69.5kJ throughout the projectile's ascent. How much higher would the projectile have gone were air drag negligible.
q1. an airplane is flying with a velocity of 80.0 at an angle of 26.0 above the horizontal. when the plane is a
At one instant a bicyclist is 35.0m due east of a park's flagpole, going due south with a speed of 20 m/s. Then, 19 s later, the cyclist is 60.0 m due north of the flagpole, going due east with the speed of 11 m/s. For the cyclist in this 19s inte..
For a rough calculation, we shall assume that the doctor is 50 from the baby (she is likely to be even closer at delivery), has a mass of 75.00, and can be modelled as a uniform sphere.
A system absorbs at a 45% efficiency in a location where average solar-energy hitting the solar pan- els is 210 W/m2. what volume of water can be heated in one hour
When jumping straight down, you can be seriously injured if you land stiff-legged. In a stiff-legged landing he comes to a halt in 2.5 ms. Find the average net force that acts on him during this time
A stone used to grind wheat into flour is turned through 12 revolutions by a constant force of 21.6 N applied to the rim of a 9.2-cm-radius shaft connected to the wheel
A ray of sunshine is passing from diamond into crown glass; the angle of incidence is 35.00 degrees. Determine the angle between the refracted blue and red rays
In the Olympiad of 700 BCE, athletes competing in the standing long jump used handheld weights called halters to lengthen their jumps. The weights were swung up in front just before liftoff and then thrown backward during the flight.
A tungsten target is struck by electrons that have been accelerated from rest through a 62.0-kV potential difference. Find the shortest wavelength of the radiation emitted
The escape speed of a particular planet with a radius of 8.600e+6 m is 14,500 m/s. What is the mass of the planet
A modem is designed to transmit at 100 kbps over a channel with 15 dB signal to nose ratio. Find the maximum symbols on the constellation of this modem.
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