1. No algorithms for this problem. Three forces given by F =(-2,00i + 2.00)N, F =(5.00i – 3.00 )N, F, =-4.50ÎN act on an object with mass of 2.00 kg sitting on a frictionless surface. (These are all the forces acting!) a) Draw the free body diagram of the object in a coordinate system. Draw Force vectors to approximate scale. b) Find the acceleration as an ij vector and in polar coordinates (magnitude, direction) c) Sketch the vectors as a vector sum in a coordinate system. Draw force vectors to approximate scale. (FNET = ma). c) If starting from rest at the origin, what is the velocity and displacement after 10 seconds (polar coordinates)?

Q: F-100 N trict yrav 600 N

A: frictional force (f) = 100 N gravitational force = 600 N Normal force = gravitational force= 600 N

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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.