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Introductory Physics Homework Help
Solving for final position with a negative work value
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[QUOTE="TSny, post: 4965334, member: 229090"] Hello, and welcome to PF! The force values are all positive as indicated in the graph. This means that the force is always directed toward the positive x direction. You mentioned that you thought that displacement cannot be negative. But this is not true. You may assume that the object can move in either direction along the x axis. For example, the object might have been given an initial velocity in the negative x direction so that it will move toward negative x even though there is a force acting toward positive x. (Similar to throwing a ball upward. The ball travels upward while the force of gravity acts downward.) If a force acts in the positive x direction while an object moves toward the negative x direction (i.e., negative displacement), what is the sign of the work? Think about how the object can start at x = 0.50 m and move such that the work done on the object is negative. [/QUOTE]
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Solving for final position with a negative work value
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