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A 10.0-kg uniform ladder that is 2.50 m long is placed against a smooth vertical wall and reaches to a height of 2.10 m, as shown in the figure. The base of the ladder rests on a rough horizontal floor whose coefficient of static friction with the ladder is 0.800. An 80.0-kg bucket of concrete is suspended from the top rung of the ladder, right next to the wall. What is the magnitude of the friction force that the floor exerts on the ladder?
A rectangular loop of wire with length L = 29.5 cm and width W = 16.7 cm carries a current I1 = 1.92 A. What is the magnitude of the net force on the loop
A test rocket is fired straight up from rest with a net acceleration of 20 m/s2. What maximum elevation does the rocket reach
A space station, in the form of a wheel121m in diameter, rotates to provide an "artificial gravity" of2.70m/s2for persons who walk around on the inner wall of the outer rim. Find the rate of the wheel's rotation in revolutions per minute that will pr..
When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. What is the speed of the lighter car just after collision
Assume Rutherford used an alpha particle with a kinetic energy of 5.25MeV and fired them into a sheet of aluminum, one atom thick. Determine the minimum radius of approach
a bar of length 2 cm slides along metal rails at a speed of 1 cms. the bar and rails are in a magnectic field of 2 t
A series RLC circuit has components with the following values: L = 18.0 mH, C = 90.0 nF, R = 10.0 ?, and ?Vmax = 100 V, with ?v = ?Vmax sin ?t. Find the resonant frequency of the circuit
a 125g mass attached to a spring oscillates with an amplitude of 7.8cm and a maximum speed of 0.625ms. find the force
at any instant the horizontal position of a weather balloon is defined by x30t ft where t is given in seconds. if the
What are (a) x component and (b) y component of a vector in the xy plane if its direction is 329° counter clockwise from the positive direction of the x axis and its magnitude is 9.0 m.
A laser emits a narrow beam of light. The radius of the beam is 1.5 mm, and the power is 2.9 mW. What is the intensity of the laser beam
An 7.17 kg block drops straight down from a height of 1.21 m, Find the maximum compression of the spring
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