Problem 12: A 2.00-kg block is placed on a frictionless surface. A spring with a force constant of k = 32.00N/m is attached to the block, and the opposite end of the spring is attached to the wall. The spring can be compressed or extended. The equilibrium position is marked as x = 0.00 m. Work is done on the block, pulling it out to x = +0.02 m. The block is released from rest and oscillates between x = +0.02 m and x = -0.02 m. The period of the motion is 1.57 s. Determine the equations of motion of displacement x(t), velocity v(t) and acceleration a(t).

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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.