A 55 kg person standing on a bathroom scale in an elevator which is going up with an acceleration of 3.5 m/s². (g = 9.8 m/s²) a) Draw a motion diagram for the person. Also, indicate the direction of change in velocity. b) Draw a force diagram for the person. Write the meaning (definition) of symbols used. c) Calculate the force exerted by the scale in an elevator on the person. d) Calculate the force exerted by the scale on the person when the elevator is at rest.

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A: As per guidelines i can answer the 1st three parts only. Please repost the last part seperately.

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!