Question

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Answer 1

Answer:

yfind out whether the acceleration is positive or negative - a.A ball rolling on a level ground b. A train starting from the stationNow the ball is under the influence of gravity, which, on the surface of the Earth, causes all free-falling objects to undergo a vertical acceleration of –9.8 m/s2. This acceleration is negative because its direction is vertically downward.When a ball is rolling on ground their is a friction force which retards the motion of ball and make it zero finally.

Answer 2

Answer:

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