15. An object is moving along a straight line. The graph shows the velocity of the object over time https://tcan4424-oakcliff-ccl.gradpoint.com/Resour...What is the instantaneous acceleration of the object at time = 6 seconds?

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16.

An airplane needs to reach a velocity of 199.0km/h to take off. On a 2000-m runway, what is the minimum acceleration necessary for the plane to take flight? Assume the plane begins at rest at one end of the runway.