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a runner of mass m=37kg and running 2.8 m/s runs and jumps on the rim of a playground merry go round which has a moment of inertia of 383 kg.m2 and a radius of 2 meters. Assuming the merry go round is initially at rest, what is its final angular velocity?
two charged dust particles exert a force of 7.3times10-2n on each other. what will be the force if they are moved so
a 10 lb sphere 6 inches in diameter and a 10lb hoop 12 inches in diameter roll down a 30 degree slope find the
A frictional force of 320 N acts on the rim of a 1.4 m diameter wheel to oppose its rotational motion. What is the torque about the wheel's central axis
explosives are used to blow a rock apart. the explosion blows the rock into three fragments. two fragments go off at a
Three pendulums with strings of the same length and bobs of the same mass are pulled out to angles q1, q2 and q3 correspondingly and released. The approximation sin q = q holds for all three angles, with q3 > q2 > q1. How do angular frequencies of th..
Electrons are used in a single-slit diffraction experiment. Such an experiment works well if the slit has a width of 10 times the wavelength. what is the electron energy
In vacuum, two charged particles lie 2.5 cm apart. Find the magnitude and direction of the electric field at a point midway between the two particles. (One has a charge of -8.0 µC and the other has a charge of +4.0 µC.) Magnitude.
A 5p-mm-focal-length lens has f-stops ranging from f/1.4 to f/22. What is the corresponding range of lens diaphragm diameters
an electron moves in a circular path perpendicular to a constant magnetic field of magnitude 1.00 mt. the angular
The metal plates of a TV tube are parallel and 12 mm apart. The potential difference between them is 12 kV. Find the force on an electron passing between the plates
A 0.250-kg piece of aluminum that has a temperature of -173 °C is added to 1.0 kg of water that has a temperature of 1.4 °C. determine the mass of water that has been frozen into ice
A kite is hovering over the ground at the end of a straight 44-m line. The tension in the line has a magnitude of 15 N. Find the height of the kite
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