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During a workout, the football players at State U ran up thestadium stairs in 60 s. The stairs are150 m long and inclined at an angle of30°. If a typical player has a mass of 105 kg, estimate the average power output on the way up. Ignore friction and air resistance.
A 2.30 kg object attached to a spring moves without friction and is driven by an external force given by F = (3.00 N) sin(2pt). If the force constant of the spring is 25.0 N/m, determine the period
As you zip through space in your PPS (personal propulsion suit), your pulse rate, as you count it, is 115 bpm, How fast are you moving with respect to the Moon
The coefficient of friction between the ladder and ground is 0.6 and the ladder makes an angle, theta with the ground equal to 50 degrees. Explain how far up the ladder can an 800N man climb before the ladder begins to slip?
Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 1.19 m. find the magnitude of the initial acceleration of the third sphere
Tension is maintained in a string The observed wave speed is 26.5 m/s when the suspended mass is m = 2.87 kg. What is the mass per unit length of the string
AC power is carried to a home via a transmission line, where each wire has a resistance of 0.36 OHMS. What is the rms voltage on the primary side of transformer T2
An asteroid is discovered to have a tiny moon that orbits it in a circular path at a distance of 115 km and with a period of 49.0 h. Find the escape velocity from the asteroid
A two-slit apparatus is covered with a red (643 nm) filter. When white light is shone on the filter, on the screen beyond the two-slit apparatus, how wide will that diffraction maximum be
The disk in a CD player does not rotate at a constant rate, but spins at a rate determined by a control circuit so that the linear speed of the track being read is constant, what will be its rotation rate at the end
A horizontal 2.00-m long, 5.00-kg uniform beam that lies along the east-west direction is acted on by two forces. At the east end of the beam, What is the angular acceleration of the beam
One cubic meter of water flowing over Niagara Falls in New York drops 92.2 meters. how much heat energy would the water have
An outside loudspeaker (considered a small source) emits sound waves with a power output of 100 W. (a) Find the intensity 10.5 m from the source. W/m2 (b) Find the intensity level in decibels at that distance. dB (c) At what distance would you experi..
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