p truck When suddenly you see a giant hole in the road 55 m ahead of you. Fortunately, your foot is right beside the brake and your reaction time is zero! a. Can you stop the truck before it falls into the hole? b. If your answer to part a is yes, can you stop without the antiques sliding and being damaged? Their coefficients of friction are us 0.60and u = 0.30. Hint: You're not trying to stop in the shortest possible distance. What's your best strategy for avoiding damage to the antiques? 56. I| The 2.0 kg wood box in FIGURE P6.56 slides down a vertical wood wall while you push on it at a 45° angle. What magnitude of force should you apply to cause the box to slide down at a constant speed? 2.0 kg push 45° sd boliso An AEFIGURE P6.56 101 ertical wood wall by ed against

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.