A wheel of diameter 0.70 m rolls without slipping. A point at the top of the wheel moves with a tangential speed 2.0 m/s
(a) At what speed is the axis of the wheel moving?
(b) What is the angular speed of the wheel?
(a) 1.0 m/s
(b) 2.9 rad/s
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A turbine blade made of Udimet 700 must be able to operate at a temperature of 1000°C (1832°F) for a time of 10,000 h between inspections. What is the maximum tensile stress for this blade based upon high-temperature creep rupture?
What will be an ideal response?
Energy Conservation With Conservative Forces: A roller coaster starts from rest at a height h at the left side of a loop-the-loop, as shown in the figure. It is not attached to the track in anyway, and there is no friction from the track or from air resistance. If the radius of the loop is R = 6.0 m, what is the minimum height h for which the roller coaster will not fall off the track at the top of the loop?
A. 21 m B. 18 m C. 15 m D. 12 m E. 8.5 m
In size and density, both Io and Europa resemble
A) our Moon. B) Pluto. C) Mars. D) Mercury. E) Charon.
A 2.0-g string that is 0.67 m long is under tension. The string vibrates at 700 Hz tone in its third harmonic, and this vibration causes a sound wave. What is the wavelength of the sound? The speed of sound in air is 344 m/s
A) 0.49 B) 0.55 C) 0.61 D) 0.67 E) 0.45