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A knight sits on a castle wall during a siege.To while away the time, he notes that boulders catapulted from below land on the top of his wall with a vertical velocity of 9.9 m/s. If he is 35 m above the catapult, what is the initial velocity of the boulders? Theacceleration of gravity is 9.8 m/s
a 60.0-kg woman balances on one heel of a pair of high-heeled shoes. if the heel is circular and has a radius of 1.00
a 44 mh inductor is connected to 220 v 50 hz ac supply. determine the rms value of the current in the
Two identical conducting spheres, fixed in place, attract each other with a force of 0.084 N when their center to centerseparation is 40.00 cm. The spheres are then connected by a thin conducting wire.
An object is a distance of s from the center of a silvered spherical glassChristmas tree ornament which has a diameter of d, What is the position and magnification of its image
An archer pulls her bowstring back 0.370 m by exerting a force that increases uniformly from zero to 227 N. (a) What is the equivalent spring constant of the bow? ____N/m (b) How much work does the archer do in pulling the bow? _____J
A column of soldiers, marching at 134 paces per minute, keep in step with the music of a band at the head of the column. what is the approximate length of the column
The safe slides with a constant speed if Clyde pushes from behind with 420 {rm N} of force while Bonnie pulls forward on a rope with 285 {rm N} of force. Illustrate what is the safe's coefficient of kinetic friction on the bank floor?
A circular saw blade of diameter 0.175m starts from rest. In a time interval of 5.60s it accelerates with constant angular acceleration to an angular velocity of 140rad/s
A 120-V motor has mechanical power output of 2.10 hp. It is 80.0% efficient in converting power that it takes in by electrical transmission into mechanical power.
question1a ball of mass 10 kg and a ball of mass 1000 kg are ?oating in empty space connected by a spring of negligible
A solenoid of length 3.06 cm and diameter 0.663 cm is wound with 170 turns per cm. what is the magnetic flux through one of the windings of the solenoid
A sky diver of mass 53 kg can slow herself to a constant speed of 92 km/h by orienting her body horizontally, looking straight down with arms and legs extended. What is the magnitude of the drag force on the sky diver
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