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A light spring having a force constant of 139N/m is used to pull a 9.60kg sled on a horizontal ice rink. The coefficient of kinetic friction between the sled and the ice is 0.200. The sled has an acceleration of 2.40m/s^2 . A)Calculate the net upward force on her at the moment the spring reaches its greatest compression. B) Calculate her upward acceleration, in g’s at that moment.
A wheel of radius 1.6m rotates at a uniform speed. If a point on the rim of the wheel has a centripetal acceleration of 2.3m/s2 , what is the point's tangential speed
Three forces act on a body which moves with constant velocity. One force is 9 N acting at an angle of 70°, What is the angle of the third force
A basketball is launched with an initial speed of 10.0 m/s and follows the trajectory shown. From what distance x the ball is shot
A 40-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, kinetic energy decreases to 240J from 470J. How high does she rise during this interval? Avoid air resistance.
A 20 liter tank of helium is at a pressure of 172kPa at a temperature of 0 C. What is the speed of the helium atoms in the tank at this new volume
A 87g arrow is fired from a bow whose string exerts an average force of 130N on the arrow over a distance of 80cm. Illustrate what is the speed of the arrow as it leaves the bow?
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Three 18-cm-long rods form an equilateral triangle. find the electric field strength at the center of the triangle
W hat is lumberjacks speed relative to the shore
A spring (70 N/m) has an equilibrium length of 1.00 m. The spring is compressed to a length of 0.50 }, how far up the slope will the mass move before coming to rest
A 1.0 Î¼F capacitor has a potential difference of 6.0 V applied across its plates. how much additional energy does the capacitor store
Find the diameter of the eye structure that causes a circular diffraction pattern with the first dark ring at an angle of 3.7 when viewed with monochromatic light of wavelength 630
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