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Compute all parts of given problem:
Problem: A dock worker loading crates on a ship finds that a 24 kg crate, initially at rest on a horizontal surface, requires a 71 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 57 N is required to keep it moving with a constant speed. The acceleration of gravity is 9.8 m/s+.
Part I: Find the coefficient of static friction between crate and floor.
Part II: Find the coefficient of kinetic friction.
I need help to find the coefficient of static friction between crate and floor.
It is desired to cool iron parts from 500°F to 100°F by dropping them into water that is initially at 55°F. how many kilograms of water are needed per kilogram of iron
A 11.2 kg block of metal measuring 4 cm x 2 cm x 3 cm is suspended by a spring scale and submerged in water. What is the reading on the scale
Brian is trying to pull Julie on a sled across a flat snowy field. Brian pulls on a rope attached to the sled. how much force must Brian exert on the rope to start moving the sled
what is the minimum acceleration necessary for the plane to take flight.
A rocket is fired straight up and accelerates upward at 12 m/s2 for 18 seconds. The rocket then runs out of fuel and coasts still going up. What is the package's speed when it hits the ground
a glass rod with a refractive index of 1.55 is ground and polished at both ends to hemispherical surfaces with radii of
Steel Piano string, The lowest note on a grand piano has a frequency of 27.5 Hz. The string is 2 m (more or less; let's just assume it is exactly 2.000 m) long, and its tension is 1000 N (again, more or less, so let's say it's exactly 1000 N).
A major-league pitcher can throw a ball in excess of 41.5 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the point of release
You accidentally throw your car keys horizontally at 8.0 m/s from a cliff 64 m high. How far from the base of the cliff must you look for the keys?
The vapor pressure of benzene is 100 mm Hg at 26.1 C and 400 mm Hg at 60.6 C. Estimate the heat of vaporazitaion of benzene in this temperature range
A loop of 25 turns of wire and radius 15 cm is placed perpendicular to a magnetic field of .4T. what is the average EMF produced across the soil
A bar of lead (bar A) is in thermal contact with a bar of silver (bar B) of the same length and area, Find the temperature at the junction when the energy flow reaches a steady state
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