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A weight W is supported by attaching it to a vertical uniform metal pole by a thin cord passing over a pulley having negligible mass and friction. The cord is attached to the pole 40.0 cm below the top and pulls horizontally on it. The pole is pivoted about a hinge at it base, is 1.75 m tall, and weighs 55.0 N. A thin wire connects the top of the pole to a vertical wall at an angle of 37.0 degrees to the wall. The nail that holds this wire to the wall will pull out if an outward force greater than 22.0N acts on it.
a) What is the greatest weight W that can be supported in this way without pulling out the nail?b) What is the magnitude of the force that the hinge exerts on the pole?
A fish is able to jump vertically out of the water with a speed of 5.6 m/s. How much time in seconds does it take for the fish topass a point 0.6 m above the water on the way down?
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to make ice a freezer that is a reverse carnot engine extracts 45 kj as heat at -14degc during each cycle with
What is the fraction of the hydrogen atom's mass (11H) that is in the nucleus? The mass of proton is 1.007276 u, and the mass of 11H atom is 1.007825 u.
You have a concave spherical mirror with a 13.3-cm radius of curvature. You place an object on the mirror's axis, How far is the object's image from the mirror
Moon effect. Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. Assume that the Earth-Moon (center-to-center) distance is 3.82 108 m..
A hockey puck impacts a goalie's plastic mask horizontally at 118 mph and rebounds horizontally off the mask at 50mph. with what speed will the goalie move
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