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A 8.26 -m ladder with a mass of 20.3 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 239 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular acceleration of 1.76 rad/s2 about an axis passing through the bottom end of the ladder. The ladder's center of gravity lies halfway between the top and bottom ends.
(a) What is the net torque acting on the ladder?
(b) What is the ladder's moment of inertia?
A container is filled to a depth of 19.0 cm with water. On top of the water floats a 32.0-cm-thick layer of oil with specific gravity0.600
A person is watching water waves at the ocean and they notice the peak to peak distance between the waves is 3.4 m. How fast are the waves going
For the patch antenna described above, assume that the maximum electric field in the substrate is 9 kV/cm. Calculate the maximum radiated power.
What is the minimum delay between saying something and getting a response? I know the radius between the satellite and the center of the earth, but I don't know how to find the delay.
A 740 N diver drops form a board 9m above the waters surface. The acceleration of gravity is 9.81m/s^2. Find the diver's speed 4.7m above the water's surface
A 63.1 kilogram skier coasts up a snow-covered hill that makes an angle of 26.4 degree with the horizontal. Obtain the magnitude of the kinetic frictional force
A dentist's chair of mass 234.0 kg is supported by a hydraulic lift having a large piston of cross-sectional area 1596.0 cm2. What force must be applied to the small piston
A solid prism has a vertical rectangular face of height H= .90 m by width W=.5 m and a horizontal rectangular face of length L= 1.2 m, with W=.5 m also. The prism is submerged in liquid whose density is D= 1600 kg/m^3 with the horizontal face at d..
A sled is pulled with a horizontal force of 20 N along a level trail, and the acceleration is found to be 0.35 m/s2. find the coefficient of kinetic friction between the sled and the trail
You are on the side of a hill with a topo map of the region. If you walked so that your trip follows a topo line you would be doing no work on your backpack.
A 6 kg block slides along a frictionless horizontal surface. The block is acted on by two forces, a 4.5 N force to the left, and a 7.5 N force to the right. At what rate is the 4.5 N force doing work on the block at the instant when its speed is 4..
A certain superconducting magnet in the form of a solenoid of length 0.40 m can generate a magnetic field of 11.0 T in its core when its coils carry a current of 145 A. The windings, made of a niobium-titanium alloy, should be cooled to 4.2 K. Discov..
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