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A 3-kg bar AB is attached by a pin at D to a 4-kg square plate, which can rotate freely about a vertical axis. Knowing that the angular velocity of the plate is 120 rpm when the bar is vertical, determine
(a) the angular velocity of the plate after the bar has swung into a horizontal position and has come to rest against pin C,
(b) the energy lost during the plastic impact at C
A charged particle moving with speed, v, enters a region containing a uniform magnetic field, Starting from Newton's second law, derive the formula for the radius of the particle's orbit in terms of its mass, m, speed, v, and the magnetic field, B
suppose you wish to fabricate a uniform wire out of 2.30 g of copper. if the wire is to have a resistance of r 0.500
A luminous object is 4.80m from a wall. You are to use a concave mirror to project an image of the object on the wall, with the image 2.23 the size of the object. How far should the mirror be from the wall?
At amusement parks, there is a popular ride where the floor of a rotating cylindrical room falls away, What is the source of the centripetal force acting on the riders
a taut rope has a mass of 0.165 kg and a length of 3.55 m. what power must be supplied to the rope so as to generate
A meterstick pivoted about a horizontal axis through the 0-cm end is held in a horizontal position and let go. A:What is the initial tangential acceleration of the 100-cm position? In meters divided by secondsquared. B:Which position has a tangent..
A police officer is investigating the scene of an accident where two cars collided at an intersection. One car with a mass of 1015 kg moving west had collided with a 1300-kg car moving north. The two cars, stuck together, skid at an angle of 30° n..
The frequency of a mass attached to a spring is 4Hz. At time t = 0, the mass has an initial displacement of 0.200m, When will the mass first reach a turning point
A boy on board a cruise ship drops a 30.0 g marble into the ocean. what is the terminal speed of the marble
A rotating door is made from four rectangular sections. The mass of all section is 85kg. A person pushes on the outer edge of one section by a force of F = 68N that is directed perpendicular to the section. All section measures 1.2m from the axis ..
You are holding a bulletin board weighing 9.46 N in place against a wall while your friend secures it to the wall. How large must this force be if the coefficient of static friction with the wall is 0.37
Bacteria vary somewhat in size, but a diameter of 2.0 nanometers is not unusual. What would be (a) volume (in cubic centimeters) and (b) surface area (in square millimeters) of such a bacterium, assuming that it is spherical.
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