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A bag of cement of mass m is located on plank of length L. Bag is located a distance of L/4 from one end of plank. Plank itself has mass m two person pick up plank one at each end. Find how much must the person nearest the bag support?
An object of mass m is dropped from height habove a planet of mass M and radius R. Find an expression for the object's speed as it hits the ground
A disk rotates about a fixed axis with an initial angular velocity of 20 rad/s. During a 5.0-s interval the angular velocity decreases to 10 rad/s. How many radians does the disk turn through during the 5.0-s interval
An electron in a magnetic field has a cyclon frequency of 7.0 x 10^12 Hz. What is the magnetic field strength? the mass of an electron is 9.1 x 10^-31 kg, and the charge of an electron is 1.6 x 10^-19 C.
A turntable of mass 5.01 kg has a radius of 0.129 m and spins with a frequency of 0.530 rev/s. What is its angular momentum? Assume the turntable is a uniform disk.
a fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. the
The equation of a transverse wave on a string is y = (2.0 mm) sin[ (20 m-1)x - (600 s-1)t)]. Find the linear density of this string in grams per meter
A generator uses a coil that has 390 turns and a 0.65-T magnetic field. The frequency of this generator is 60.0 Hz, determine the length of the wire from which the coil is made
Two protons are separated by a distance of 0.06 cm. What is the magnitude of the electric force for the protons
A piano is brought upstairs by two workers. Due to a mistake by one of the workers, the piano rolls down the stairs and finally comes to rest by the outside door.
A proton traveling at 26.0° with respect to a magnetic field of strength2.80 mT experiences a magnetic force of6.2 10-17 N. Compute the proton's speed. Compute its kinetic energy.
A diving board length = 5.60 that weighs 250 is supported by two pillars. One pillar is at the left end of the diving board; the other is distance = 1.65 away. Determine the magnitude of the force exerted by the left pillar while an 80.0 diver sta..
The car drives straight off the edge of a cliff that is 57 m high. The investigator at the scene of the accident notes that the point of impact is 130 m from the base of the cliff.
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