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A ladder of weight 200 N and length 10 meters leans against a smooth wall (no friction on wall). The ladder makes an angle 50.0° with the ground. A fire fighter of weight 600 N climbs a distance x up the ladder. The coefficient of friction among the ladder and the ground is 0.5. What is the maximum value of x if the ladder is not to slip?
A solid sphere of mass 0.524 kg rolls without slipping along a horizontal surface with a translational speed of 5.33 m/s. It comes to an incline that makes an angle of 31.7° with the horizontal surface. Ignoring energy losses due to friction, to what..
A high diver leaves the end of a 5-m-high diving board, and strikes the water 1.3 s later, 3 m beyond the end of the board. determine the velocity with which she enters the water
A block is connected among two springs on a frictionless, horizontally level track. The other end of each spring is respectively anchored to a vertical pin set at opposite ends of the track.
A highway curve with a radius of 550 m is banked properly for a car travelling 130 km/h. If a 1660- kg Porshe 928S rounds the curve at 250 km/h, how much sideways force should the tires exert against the road if the car does not skid.
Aluminum is a very light metal with density of 2.7 g/cm^3. What is the weight in pounds of a solid sphere of aluminum of radius 50 cm
At a certain distance from the center of the Earth, a 4.5- object has a weight of 4.0 , by what factor does its weight change
Two particles of equal mass m are at the vertices of the base of an equilateral triangle. What is the mass m' at the third vertex
A cylindrical flask is fitted with an airtight piston that is free to slide up and down, as shown in the figure below. A mass rests on top of the piston. The initial temperature of the system is 313 K and the pressure of the gas is held constant at 1..
The density of charge-carrying electrons in copper is 8.5 × 1028 electrons m?3, its resistivity is 1.72 × 10-8 ?·m, and the drift speed is 2.80 × 10-3 m/s. At what rate must thermal energy be carried off by a cooling medium
The contacts worn by a farsighted person allow her to see objects clearly that are as close as 25.0 cm, How far away is the poster actually located
A 1000 resistor is made by wrapping this wire in a spiral around a 3.90 -diameter glass core. How many turns of wire are needed
Two solid spheres, each of mass m, are rolling without slipping with a speed v. If the spheres have radii R1 and R2 with R1/R2 = 7.3, what is the ratio of their kinetic energies
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