An aeroplane requires for take off a speed of 108 kmph the run on the ground being 100m. Mass of the plane is 104kg and the coefficient of friction between the plane and the ground is 0.2. Assuming the plane accelerates uniformly the minimum force required is (g =10ms-2)

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2 x 104 N

2.43 x 104 N

6.5 x 104 N

8.86 x 104 N

answer is C.

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Detailed Solution

F−μkmg=ma,v2−u2=2as

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