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The semicircular disk having a mass of 10 kg is rotating at ω= 4 rad/s at the instant θ= 60o . If the coefficient of static friction at A is μs = 0.5, determine if the disk slips at this instant.
The diameter of a sphere is measured to be 6.94 in. Find the radius of the sphere in centimeters
A laser beam shines straight up onto a flat, black foil with a mass of 23.0 ?g. What laser power is needed to levitate the foil
You have a 1.93-m-long stretched string with a mass of 19.5 g. When you oscillate the string at 440 Hz, Calculate the tension in the string
A particle of mass m is positioned at the "north pole" of a frictionless smooth sphere of radius R. what is its velocity at that moment
You are holding a compass 3.50m from a long straight electrical supply wire that is carrying a direct current perpendicularly to the local direction of the Earth's magnetic field. What is the magnitude of the current carried by the wire
A baseball is thrown with an inital velocity of 20 m/s along the horizontal axis and 15 m/s along the vertixal axis. The ball soon reaches the highest point, what is the speed at that point? (ignore air friction) I know the answer is 20 m/s, just nee..
what is the gravitational acceleration at altitude 1.2 Re above the earth's surface. what is the orbital speed
A converging lens has a focal length of f = 29 cm. If an object is placed 40 cm from the lens, where will the image be formed.
A 2590-kg spacecraft is in a circular orbit 2720 km above the surface of Mars. How much work must the spacecraft engines perform to move the spacecraft to a circular orbit that is 4480 km above the surface
Suppose the gasoline in a car engine burns at 637 oC, while the exhaust temperature (the temperature of the cold reservoir) is 106 oC, Determine the ratio of the total work produced by both engines to that produced by the first engine alone
A pesky 1.7 mg mosquito is annoying you as you attempt to study physics in your room, which is 4.5m wide and 2.5 m high. What is the maximum uncertainty in the horizontal position of the mosquito
An elastic cord is 69 cm long when a weight of 57 N hangs from it but is 70 cm long when the weight of 75 N hangs from it. What is the "spring" constant k of this elastic cord.
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