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While a roofer is working on a roof that slants at 43.0 degrees above the horizontal, he accidentally nudges his 95.0 N toolbox, causing it to start sliding downward, starting from rest. If it starts 4.45 m from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 19.0 N?
A 2.3 kg box, starting from rest, is pushed up a ramp by a 10 N force parallel to the ramp. The ramp is 2.0 m long and tilted at 17 degrees. How much work does the force do on the system
The Hall effect can be used to determine the density of mobile electrons in a conductor. Find the density of mobile electrons in the material
A pinada, practically in a shape of a slender thin rod of length mass 4.0 kg is hanging from the tree branch after being hinged at one end. Estimate how high the pinada will swing
A 400 cm rope under a tension of 90 N is set into oscillation. The mass density of the rope is 170 g/cm. What is the frequency of the first harmonic mode (m = 2)?
A cave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. The lift is performed in three stages, each requiring a vertical distance of 14.0 m
An object moves with constant acceleration 4.45 m/s2 and over a time interval reaches a final velocity of 12.4 m/s. If its initial velocity is 6.2 m/s, what is its displacement during the time interval
A gas in a cylinder is held at a constant pressure of 2.20×10^5 Pa and is cooled and compressed from 1.70m^3 to 1.40m^3. Find the amount of the heat that flowed into or out of the gas
After the Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state. Calculate the average density of the white dwarf
A heat engine produces 12,000 W of power and operates at an efficiency of 21%. What is the heat input to the engine
imagine someone drops an apple from a vertical distance.
Santa loses his footing and slides down a frictionless, snowy roof that is tilted at an angle of 29.0 degrees. what is his speed as he leaves the roof
A wire is 3.500 m long. After applying a force to one end of the wire, it is now 3.504 m long. Calculate the tensile strain in the wire
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