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Part 1 A spool of wire of mass 6.9 kg and radius 0.28 m is unwound under a constant wire tension 15 N. Assume the spool is a uniform solid cylinder that rolls without slipping. Find the friction force on the bottom of the spool. Let right be positive.Answer in units of N
Part 2 Calculate the acceleration of the spool's center of mass.
As a projectile moves in its path, is there any point along the path where the velocity and acceleration vectors are (a) perpendicular to each other? (b) Parallel to each other?
A student is reading a lecture written on a blackboard. If the writing on the blackboard is 4.80 cm high, what is the size of the image on her retina
A uniform 1.9-kg rod that is 0.97 m long is suspended at rest from the ceiling by two springs, one at each end. Find the angle that the rod makes with the horizontal
Calculate the speed of a proton after it accelerates from rest through a potential difference of 170V, Calculate the speed of an electron
a man is trying to get his car out of mud on the shoulder of a road. He ties one end of a rope tightly around the front bumper , What is the magnitude of the force on the car from the rope
A yo-yo is made of two solid cylindrical disks, each of mass 0.052 kg and diameter 0.070 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0053 kg, What fraction of its kinetic energy is rotational
A string 3 meters long has a mass of 2 grams. one end of the string is attached to a wall, what is the speed of a transverse wave in this string
A sailor strikes the side of his ship just below the waterline. He hears the echo of the sound reflected from the ocean floor directly below 1.3 s later. How deep is the ocean at this point? Suppose the speed of sound in seawater is 1560 m/s and d..
Two speakers, one directly behind the other, are each generating a 429-Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at a listener standing in front of them? Take the speed of ..
A 1.00 cm object is 60.0 cm in front of a diverging lens that has a -30.0 cm focal length. Find the image position and height. Is the image real or virtual? Is the image upright or inverted
You want to create an electric field at location. where would you place an electron to produce this filed at the origin
A metal rod (2.4 kg, 1.5 m long) is rotating about an axis through its center at 20.0 rad/s. Calculate its rotational kinetic energy
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