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A 50-kg person was moving on a 20-kg movable platform on top of a smooth surface such as ice. A force of 70-N was applied to the platform and the platform responded instantly at 4 m/s/s. 2a Find the minimum force (magnitude and direction) that the person exerted on the platform. 2b Determine the dancer moving direction, right or left, as the platform responded instantly at 4m/s/s. Explain

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23、 lo N Pensim muVe in lett LIt Plastc tomm

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