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The 'e' Equation

The graph des...

Question

The graph describes an airplane’s acceleration during its take – off. The airplane’s velocity when it lifts off at t = 20s is

40 m/s

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50 m/s

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90 m/s

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180 m/s

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Solution

The correct option is C 90 m/s
Area under the graph = Change in velocity
$= 40 + 50 = 90 m / s$

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