At what time does she reverse direction

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Sally is driving along a straight highway in her classic 1965 Mustang. At time t=0, when Sally is moving at 15 m/s in the positive direction, she passes a signpost at x =50 m. Her acceleration is a function of time:

a= 2.0-0.10t where a is in m/s^2 and t is in seconds.

At what time does she reverse direction?

Reference no: EM131653508

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