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An escalator carries you from one level to the next in an airport terminal. The upper level is 4.7m above the lower level, and the length of the escalator is 7.4m .Assume that your mass is 65kg .
How much work does the up escalator do on you when you ride it from the lower level to the upper level?
How much work does the down escalator do on you when you ride it from the upper level to the lower level?
a 100 kg cannon at rest contains a 10 kg connon ball. When fired, the cannon ball exits the cannon with a speed of 90m/s. What is the recoil speed of the cannon
a 70.0-kg person stands on a scale in an elevator. what is the apparent weight in each of the following situations?a
A long straight wire carries a current of 88.0 A. An electron, traveling at 6.5x10^7 m/s, is 1.5 cm from the wire. What force (magnitude and direction) acts on the electron if the electron's velocity is directed toward the wire?
Water flowing in a horizontal pipe is at a pressure of 1.55 105 Pa at a point where its cross-sectional area is 6.00 m2. Find the water's speed in the wider pipe
A balloon is rising at 10 m/s when its passenger throws a ball straight up at 12 m/s. How much later does the passenger catch the ball
A bicyclist climbs a hill 17 m tall and then coasts down the other side without pedaling. If the cyclist's speed was 2.5 m/s at the top, what is it at the bottom (ignoring friction)?
A pump is used to empty a 4800 L. wading pool. The water exits the 3.0-cm-diameter hose at a speed of 2.0 m/s
A charged particle is moving horizontally westward with a velocity of 3.5 x 10^6 m/s in a region, What is the charge on the particle
A ball of mass 20 kg moves with a velocity of 2 m/s along the +x axis (call it ball A). It collides with a ball of mass 12 kg which is initially at rest (call it B), What is the final velocity of ball B
In conducting circles, find where is the magnitude of the electric field the largest? Determine where is it the smallest
A blimp is cruising slowly at low altitude, full as usual with helium gas. Its maximum useful payload, including crew and cargo is 1260 kg. The volume of the helium-filled interior space is 6960 m3. The density of helium gas is 0.16 kg/m3, and the de..
A bullet of mass mb is fired horizontally with speed v1 at a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the bloc..
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