A horizontal force of 22 lb is required to just start a 50-lb block in motion on a horizontal surface. Determine the coefficient of static friction between the block and the supporting surface?
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A horizontal force of 22 lb is required to just start a 50-lb block in motion on a horizontal surface. Determine the coefficient of static friction between the block and the supporting surface?
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- A force of 62,125 pounds pulls on a steel rod that has a diameter of 1800 inches. Find the force pulling on 1 square inch of the cross-sectional area. Round the answer to the nearest pound.A firework of mass 0.4 kg is fired vertically upwards with initial speed 40 m/s. The firework itself provides a force of 2 N upwards. The firework explodes after 6s. Find the height at which it explodes.Eighteen foot-pounds of work is required to stretch a spring 4 inches from its natural length. Find the work required to stretch the spring an additional 3 inches.Use Hooke's Law to determine the variable force in the spring problem. Work done
- The gravitational force on a 10 kg object at a distance r meters from the center of the Earth is F = Newtons. Find the work done in moving the object from the surface of the Earth to a height 106 meters above the surface. The radius of the Earth is 6.4 × 106 meters. 4 x 1015 p²The force P = 15 lb is applied to the cable and the cords slip on the smooth surfaces of the non- rotating pulleys. Determine the magnitude and direction of the acceleration of the 36-lb cylinder if (a) the pulleys are massless, (b) the pulleys are 4 lb each. (a = 21.5 ft/sec², a = = 6.9 ft/sec²) P WA 71kg skydiver in free fall is subjected to a crosswind exerting a force of 61 N and to a vertical air resistance of 101 N. Calculate the resultant force acting on the skydiverand the angle of his fall (relative to vertical)
