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The 65.0 kg climber in the figure is supported in the "chimney" by the friction forces exerted on his shoes and back. The static coefficients of friction between his shoes and the wall, and between his back and the wall, are 0.85 and 0.50, respectively. What is the minimum normal force he must exert? Assume the walls are vertical and that the static friction forces are both at their maximum. Ignore his grip on the rope.
A mass is attached to a spring. It oscillates at a frequency of 4/? Hz when displaced a distance of 7.00 cm from equilibrium
A 1600kg sedan goes through a wide intersection traveling from north to south when it is hit by a 2500kg SUV traveling from east to west. How fast was sedan traveling just before the collision
A slab of glass with an index of refraction of 1.55 is submerged in a liquid with an index of refraction of 1.25. Find the angle of refraction for the angle of incidence of 60°
An electron and a positron each of mass 9.1 x 10^-31 kg, are in the same general vicinity and have very small initial speeds
A solid (cylindrical) flywheel of mass m and radius r is initally at rest. A force F acts tangentially on its perimeter for a time t. Show that its angular velocity at t = 2Ft/mr . Illustrate what is its angular displacement during that time?
A block of mass m is attached to a spring (spring constant k)which is attached to a wall, find the amplitude of the resulting simple harmonic motion?
Two large parallel metal plates are 1.4 cm apart and have charges of equal magnitude but opposite signs on their facing surfaces. what is the electric field (in V/m) in the region between the plates
the coefficient of kinetic friction between the table and the block is 0.320. Sand is gradually added to the bucket until the system just begins to move. Compute acceleration of the motion.
Consider two widely separated conducting spheres, 1 and 2, the second having six times the diameter of the first. Find the final charge q1 and q2
A 190 g ball moving at 0.45 m/s in the + x- direction is subject to a 0.15 N force in the - y- direction for 2.5 s. Find the magnitude of the ball's momentum change
A 72-kg base runner begins his slide into second base when he is moving at a speed of 3.9 m/s. How far does he slide
The minimum stopping distance for a car traveling at a speed of 30 {m/s} is 60 {m}, including the distance traveled during the driver's reaction time of 0.50 {s}.What is the least stopping distance for the same car traveling at a speed of 41 {m/s}..
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