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Sand drops at the rate of 2000 kg/min. from the bottom of a hopper onto a belt conveyor moving horizontally at 250 m/min. Determine the force needed to drive the conveyor, neglecting friction.
A 10.0 meter long, 200 N ladder rests against a wall frictionless. Obtain the coefficient of friction if the man stops 6.00 meter up the ladder
A moving particle encounters an external electric field that decreases its kinetic energy from 9460 eVto 7120 eV as the particle moves fromposition A to position B.
an electron and a proton are each accelerated through a potential difference of 21 million volts. find the momentum in
a wood cube 0.32m on each side has a density of 750 kgm3 and floats levelly in water. what is the distance from the top
A 70 kg man walks along a 40 kg horizontal plank which is 2 m long. The plank is attached to a hinge mounted to one wall, calculate the force provided by the hinge on the wall
The accumulator is to supply 10,000 in3 of oil to the piston at a maximum pressure of 400 psig and a minimum pressure of 300 psig. Find the size of the accumulator
A charge of 5.0 nC is be placed in the center of three solids of equal volume, Calculate the electric flux out of one face of the tetrahedron
A wooden block of mass M resting on a frictionless, horizontal surface is attached to a rigid rod of length and of negligible mass. What is the angular momentum of the bullet-block system about a vertical axis through the pivot
A car moves with a constant acceleration of 2.1 m/s2. At a time of 1 s, it is 170 m beyond a mile marker, Find the car's position after the mile marker at time 5 s
in a system over thee corner of a table with a frictionless mass less pulley. where block a is on the table with block
A bowling ball encounters a 0.76 m vertical rise on the way back to the ball rack, as the drawing illustrates. find the translational speed at the top
A high diver of mass 65.0 kg steps off a board 10.0 m above the water and falls vertical to the water, starting from rest. what average upward force did the water exert on her
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