Two forces F,1 and F, act on a 3.60-kg object. F, = 30.0 N and F, = 10.0 N. 90.0° 60.0° m (a) Find the acceleration of the object for the configuration of forces shown in Figure (a). magnitude 8.78 m/s? direction 18.4 ° (counterclockwise from F,) (b) Find th ation of the object for the configuration of forces shown Figure (b). 10.9 magnitude You find the magnitude of a force in the same manner you find the magnitude of any other vector: first resolve each vector into components. m/s? 23.4 direction You can determine the angle from the components of the net force, or from the components of the acceleration.° (counterclockwise from F1)

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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.