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Assume that a climber having mass M, and who are L tall, rappels down a vertical cliff with her body rose at a 43 degree angle above the horizontal. The climber has a center of gravity at R_g from her feet; she holds the rope at R_r from her feet, and makes at a 23 degree angle with the cliff face. Also, hanging straight down from her shoulders (a distance R_b from her feet) is a backpack having mass m. assume that R_g < R_r < R_b < L. Call horizontal and vertical forces between her feet and the wall H and V. write down the expression for net torque acting on her with respect to the top of her head.
A small, 300g cart is moving at 1.90m/s on an air track when it collides with a larger, 5.00kg cart at rest. What is the speed of the large cart after the collision
A 90 uF capacitor and a 15m H inductor are in series with a 185 O resistor, What is the resonant frequency
You are walking along a small country road one foggy morning and come to an intersection. At what speed is the ambulance traveling
As part of a safety investigation, two 1200 {rm kg} cars traveling at 24 {rm m/s} are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.80 {rm s} to stop, and (b) car that hits a..
An electric motor rotating a workshop grinding wheel at a rate of 81 rev/min is switched off. Suppose the wheel has a steady negative angular acceleration of magnitude 1.90 rad/s2.
Two generators use the same magnetic field and operate at the same frequency. Find the coil radius r of this other generator
A loudspeaker of mass 24.0 {rm kg} is suspended a distance of h = 1.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.70 {rm m}.
A flat uniform circular disk (radius = 2.40 m, mass = 1.00 x 10^2 kg) is initially stationary. The disk is free to rotate in the horizontal plane about a frictionless axis perpendicular to the center of the disk. A 45.0 kg person, standing 0.95 m fro..
Red light of wavelength 633nm from a helium-neon laser passes through a slit 0.370mm wide. What is the width of the central bright fringe?
Suppose that the helium atom, with a filled 1s electron shell, has the same ground-state radius as the Bohr hydrogen atom, Find the density of the 4He atom
The wheels, axle, and handles of a wheelbarrow weigh W = 68 N. The load chamber and its contents weigh WL = 605 N. Find the magnitude of the man's force for both designs
A toy car with mass of m=166 GRAMS crashes into a spring with constant k=45 N/m. If the car was going v=1.5 m/s, then how far will the spring compress.
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