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A block is released from rest at the top of a frictionless ramp (inclined plane) that makes an angle of 25° with respect to horizontal. At the bottom of the ramp, after having slid a distance D1, the speed of the block is observed to be 12 m/s. What is the length of the ramp D1?
A boy ties a small stone to one end of a string and holding the other end, he whirls the stone above his head in a horizontal circle. If the stone has a mass of 0.5 kg, find the centripetal force on the stone
Speedboat A negotiates a curve whose radius is 150m. Speedboat B negotiates the curve whose radius is 190m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
An automobile initially moving 72. km/hr jams the brakes and skids to a stop in a distance of 24. What is the coefficient of friction for dry weather
Tarzan, who weighs 900N, swings from a cliff at the end of a 40.0 m vine that hangs from a high tree limb, What is the magnitude of the tension on the vine
A box sits on a horizontal wooden board. The coefficient of static friction between the box and the board is 0.5. You grab one end of the board and lift it up, keeping the other end of the board on the ground.
Three equal point charges, each with charge 1.35 mu C, are located at the vertices of an equilateral triangle whose sides are of length 0.60m. What is an electric potential energy U of the system? (Take as zero the potential energy of the three ch..
A rocket in a fireworks display explodes high in the air. The sound spreads out uniformly in all directions. The intensity of the sound is 2.30 10-6 W/m2 at a distance of 110 m from the explosion. Find the distance from the source at which the int..
A 109 V potential difference is applied to a space heater whose resistance is 12 when hot. At what rate is electrical energy transferred to heat
Two identical 0.11 kg blocks (labeled 1 and 2) are initially at rest on a nearly frictionless surface, connected by an unstretched spring, how far did the center of mass of the real system move
A grating with 504 lines/mm is illuminated with light of wavelength 305 nm. What is an angular separation between the two lines formed in order m = 2.
Suppose that inside a motor 33 A passes through a 250 turn circular loop that is 11.5 cm in radius. What is the magnetic field strength created at its center in T
What is least value for which stick remain in equilibrium
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