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A 50.7-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.628 and 0.358, respectively. What horizontal pushing force is needed to (a) just start the crate moving and (b) slide the crate across the dock at a constant speed?
a person standing at the edge of a cliff throws a stone horizontally over the edge with a speed of vi 32.4 ms. the
A hydraulic lift is used to jack a 1070 kg car 13 cm offthe floor. The diameter of the output piston is 18 cm, and theinput force is 250 N. What is the area of the input piston
A traveler in a rocket of proper length 2d sets up a coordinate system S' with its origin O' anchored at the exact middle of the rocket and the x' axis along the rocket's length. At time t' = 0 she ignites a flashbulb at O'.
Derive the 5 volt reference from a 5 volt source. Apply a 1 KHz sine wave. Vary the amplitude of the input voltage and sketch the input and output waveforms.
A toroid having a rectangular cross section (a = 2.00 cm by b = 3.00 cm) and inner radius R = 3.80 cm consists of 500 turns of wire that carries a sinusoidal current I = Imax sin ?t, find the emf induced in the coil as a function of time
A window washer is standing on a scaffold supported by a vertical rope at each end. the scaffold weighs 200N and is 3.21 m long. assume the 900N worker stands 1.44 m from one end of the scaffold. what is the force on the rope farther from the work..
Two electrons are located at two of the vertices of an equilateral triangle, one at each vertex. The length of one side of the triangle is 1.00 nm. What is the net electric field at the third vertex
A 17 kilogram monkey hangs from a cord suspended from the ceiling of an elevator. Find what was the elevator minimum acceleration
questionnbspnbspa particle has initial velocity 5 ms due east and acceleration 2 ms2 due west. find the distance
A 14 kilogram box slides down a long, frictionless incline of angle 30 degree. Find the original potential energy of the box relative to the ground
An L-R-C series circuit, R = 160? , L = 0.730H , and C = 2.00×10?2?F . The source has a voltage amplitude of 160V and a frequency equal to the resonance frequency of the circuit. What is the average power delivered by the source
An open-topped cylindrical pot has a volume of 125cm3. What dimensions will minimize the total amount ofmaterial used in making this pot? Neglect the thickness of thematerial as well as possible wastage.
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