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A day-care worker pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a spinning rate of 18.2 rpm in 10.0 second. Suppose the merry-go-round is a disk of radius 2.30 meter and has a mass of 870 kilogram, and two kids (each with a mass of 25.2 kilogram) sit opposite each other on the edge. Find the torque required to produce the acceleration? Ignore frictional torque.
question a student in a parked car honks the horn which has a proper frequency of 310 hz. an observer in an approaching
If the breakers at a beach are separated by 4.0 m and hit shore with a frequency of0.24 Hz, with what speed are they traveling
A cylinder of mass M=30 kg and radius R=2m rolls without slipping. What is the acceleration of the center of the cylinder
Mars orbits the Sun at a mean orbital radius of 228 Gm (1 GM =109 m) and has an orbital period of 687 d. Earth orbitsthe Sun at a mean orbital radius of 149.6 Gm. The Earth-Sun line sweeps out an angle of 360° during one Earth-year. Approximately ..
An aircraft, diving at anangle of 53 with the vertical, releases a package at an altitude of730 m. How far did the projectile travel horizontally
When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.7 m/s in 0.11 s. How far does the pike move during this strike? A driver has a reaction time of 0.50 s, and the maximum deceleration of her car is 6.0 m/s 2. She is..
A daredevil on a motorcycle leaves the end of a ramp with a speed of 39.5 m/s, what is the maximum height that he reaches
suppose you wish to make a solenoid whose self-inductance is 1.4 mh. the inductor is to have a cross-sectional area of
Motor oil with a viscosity of 0.250 Ns/m^s is flowing through a tube that has a radius of 3.00 mm and is 1.00 m long. What is the average speed of the oil
Potassium chloride is a crystal with lattice spacing of 0.314nm. The first peak for the bragg diffraction is observed to be at 15.0 degree. What energy x-rays were used in this diffraction measurement? What other order peaks can be observe (i.e ha..
A 60 kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 0.7 m/s. determine her altitude as she crosses the bar
A particle moves along a straight line with an acceleration of a = 2pi / (2s^(2/3) + 3s^(5/8)) m/s^2, where s is in meters. Determine the particles velocity when s = 2 m, if it starts from rest when s = 1m.
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