A flexible chain weighing 38.0 N hangs between two hooks located at the same height (figure). At each hook, the tangent to the chain makes an angle 8 = 43.0° with the horizontal. (a) Find the magnitude of the force each hook exerts on the chain. (b) Find the tension in the chain at its midpoint. Suggestion: Make a force diagram for half of the chain. N A uniform beam of length L = 7.90 m and weight 3.65 x 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam. Sam Joe +1.00 m +2.00 m- L FSam = N Fjoe = N Need Help? Read It

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Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.