Question

A child is moving in a straight line along a hallway. The velocity of the child as a function of time is shown in the graph at right. Which of the following statements is true about the acceleration of the child at time t 4 seconds? Velocity Time, sec (a) I is positive (b) It is zero (c) I is negative (d) It cannot be determined from this graph. 2 Shown at right is a graph of velocity as a function of time for an object in one- dimensional motion. Which of the graphs below best represents the acceleration of the object as a function of time? le) 3.- Find the instantaneous at each point in the position-time graph shown below Iv 200 100 I r (min)
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a cc o acceloratian is ro o to op on

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