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A 50 kg block of ice slides downa frictionless incline 1.5 m long and 0.89 m high. A worker pushes up against the ice, parallel to the incline, so that the block slides down at constant speed.
a) Find the magnitude of the worker's force.How much work is done on the block by the following forces?b) the worker's forcec) the gravitational force on the blockd) the normal force on the block from the surface of theinclinee) the net force on the block
A magician pulls a tablecloth from under a 200 g mug located 30.0 cm from the edge of the cloth. The cloth exerts a friction force of 0.100 N on the mug, and the cloth is pulled with a constant acceleration of 3.50 m/s2.
First-order Bragg diffraction is observed at 23.0 degrees relative to the crystal surface, with spacing between atoms of 0.26nm, At what angle will second order be observed
A 30.0 g goldfinch lands on a slender branch, where it oscillates up and down with simple harmonic motion of amplitude 0.0489 m, What is the maximum speed of the goldfinch
An ambulance is generating a siren sound at a frequency of 2400 Hz. The velocity of sound is 34.0 m/s. What is the frequency of the siren perceived by the observer
A 5.0 multiplied by 102-newton girl takes 10. seconds to run up two flights of stairs to the landing, a total of 5.0 meters vertically above her starting point. What power does the girl develop during her run.
A spaceship of proper length298m takes0.79µs to pass an Earth observer. find the speed of this spaceship as measured by the Earth observer
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. How fast are the waves traveling
the absolute portential at the exact center of a square is 3.0v when a charge of +Q is located at one of the squares corners. What is the absolute potential at the squares center
A block is projected up a frictionless inclined plane with initial speed v0 = 3.47 m/s. The angle of incline is ? = 32.1°.
In a certain experiment, the pressure of a gas depends on the volume by P=aV^2+b, where a=5.0 atm/m and b = 8.5 atm. What is the work done on the gas
To water the yard, you use a hose with a diameter of 3.3 . Water flows from the hose with a speed of 1.5cm. with what speed does water spray from the hose
One arm of a U-shaped tube (open at both ends) contains water, and the other alcohol. at what height will the water be
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