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Imagine a woman starting from rest, running up the stairs from the bottom floor of her apartment building to her apartment on the third floor, and then stopping to unlock her apartment door.
1) What information would you need to know in order to find the work done on her by gravity? What equation would you use?
2) What is the work done by her on gravity? Explain.
3) What is the total work done on her by all forces? How do we know this?
Two parallel rods are each 0.50 m in length. They are attached at their centers to either end of the spring (spring constant = 150 N/m) that is initially neither stretched nor compressed.
q1. helium he a monatomic gas fills a 0.009 m3 container. the pressure of the gas is 6.00 105 pa. how long would a 0.25
As two boats approach the marina, the velocity of boat 1 relative to boat 2 is 2.13 m/s in a direction 40.3° east of north. What is the direction of the velocity of boat 2
A block attached to a spring of unknown spring constant oscillates with a period of 2.0 seconds. What is the period when the mass is doubled?
A 2.4 kg iron ball is dropped from a height of 14 m onto a concrete roadway, What is the ball's increase in temperature
A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road, How far has the bicyclist traveled during the entire trip and What is the average speed of the bicyclist for the trip
A spring is hanging from the ceiling. Attaching a 700 physics book to the spring causes it to stretch 27 in order to come to equilibrium. Spring constant 25 N/m: -From equilibrium, the book is pulled down 10cm and released. What is the period of osci..
An object at rest explodes into three pieces of equal masses. One moves east at 23 m/s, while the second piece moves northwest at 14 m/s. Estimate the velocity of the third piece? Suppose each piece has a mass of 2 kg.
For the circuit shown in the figure, calculate the current in the 2.00-Ω resistor and the potential difference between points a and b.
suppose your body is rotated about an axis that 1 runs vertically through your spine or an axis that 2 runs
A hiker, who weighs 919 N, is strolling through the woods and crosses a small horizontal bridge. What is the magnitude of the force that a concrete support exerts on the bridge at the near end
A ball is thrown upward with an initial velocity of 96 ft/secfrom the top of a 100 ft building. hen will the ball attain its maximum height?
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