8. Block Mı is on top of block M2 which is on top of a horizontal, frictionless surface. A horizontal force, F, is applied to M1. The coefficient of static friction is µs and the coefficient of kinetic friction is µk. Find, a) the maximum force that can be applied to M1, such that the position of Mi relative to M2 will not change. (Mi will not slip on top of M2). Then, if the force acting on Mi is doubled, or F' = 2F, find the acceleration of each mass. M, friction M2 no friction

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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.