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A 2.00 meter long horizontal plank whose mass is 3.00 kg is placed so that the very end (the right end) rests on a retaining wall. The left end is put on the tailgate of the truck. However the tailgate is tilted a bit, so it only contacts the board at a point 25.0 cm from the end. A 2.50 kg sledge hammer is placed 0.500 meters from the retaining wall.
Find the force acting on the board by the tailgate.
Find the force acting on the board by the retaining wall.
If the density of conduction electrons is 10^27 m^3 and the wire has a radius of one millimeter, what is the electrical current through this wire
A soldier has a huge contraption that notches a large 3 kg arrow (it looks more like a lance) in a massive bow, What is the speed of the arrow
Ilustrate what is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? Straight out to his side, parallel to the floor.
Two stationary positive point charges, charge 1 of magnitude 3.10 nC and charge 2 of magnitude 1.74 nC, are separated by a distance of 36 cm. An electron is free from rest at the point midway between the two charges, and it moves along the line con..
An ac generator has a maximum potential difference output of 155V. find the rms potential difference output
a cube of wood floating in water supports a 200g mass at the centre of its top face. when the mass is removed, the cube rises by 2cm. determine the volume of the cube
must include free body diagrams with applications of newton's 2nd law 1) a 3.0 kg ball is attached to two pieces of string, compute the tension in the upper string
A certain transformer has 500 turns on the primary. If 10 volts are applied to the primary, what was the current in the primary
If wavelength is 5890 , and slits width is 0.25 mm, find its angular separation between central maxima
questiona rectangular loop has 85 turns with an area of 0.225 m2 and lies in a uniform magnetic field of 0.28 t.
A cube with side length 1.53m of solid Styrofoam is completely submerged in fresh water such that the top of the Styrofoam block, what is the buoyant force acting upon the Styrofoam block
I once observed a woman on an airplane at night with a camera. As we flew low over Washington DC she was impressed with the view of the city lights in the dark. She stood back in the aisle and tried to take the picture by the window using her flash. ..
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