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At amusement parks, there is a popular ride where the floor of arotating cylindrical room falls away, leaving the backs of theriders "plastered" against the wall. Suppose the radius of the roomis 3.52 m and the speed of the wall is 11.5 m/s when the floorfalls away. The source of the centripetal force on the riders isthe normal force provided by the wall. (a) How much centripetal force acts on a 52.9 kg rider? (b) What is the minimum coefficient of static friction that must exist between the rider's back and thewall, if the rider is to remain in place when the floor dropsaway?
Two identical speakers are separated by 3.4m and produce sound of different frequencies equally in all direction. Determine the sound level in decibels at the point that is a midway between the speakers
A model rocket is launched from rest with an upward acceleration of 6.00 m/s^2 and, due to a strong wind, a horizontal acceleration of 1.50 m/s^2. How far is the rocket from the launch pad 6.00s later when the rocket engine runs out of fuel?
a helicopter lifts a 74 kg astronaut 18 m vertically from the ocean by means of a cable. the acceleration of the
A ball of mass m=0.8kg is tied to the end of a string of length L=0.2m and released when the string is held horizontally. How far will the block slide to the right before coming to rest
Three pendulums with strings of the same length and bobs of the same mass are pulled out to angles q1, q2 and q3 respectively and free. The approximation sin q = q holds for all three angles, with q3 > q2 > q1. How do the angular frequencies of th..
a 2.0microf capacitor and a 4.0microf capacitor are connected in series across 1000 v. the charged capacitors are then
A diverrunning 1.9 m/s dives out horizontally from the edge of a verticalcliff and 2.8 s later reaches the water below. How far from its basedid the diver hit the water
A transverse sinusoidal wave on a string has a period T =28.0 ms and travels in the negativex direction with a speed of 25.0 m/s. What is the initial phase angle
The pressure exerted by a static liquid on a vertical submerged surface is calculated from the reaction:
A father racing his son has three-fifths the kinetic energy of the son, who has half the mass of the father. What is the original speed of the son
at the surface of the ocean the water pressure is the same as the air pressure above the water 15 lbin2. below the
consider light that is refracted by a prism shaped like an equilateral triangle. the incident ray is parallel with the
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