An aeroplane requires for take off a speed of `108` kmph the run on the ground being `100m` mass of the plane is `10^(4)kg` and the coefficinet of friction between the plane and the ground is `0.2`. Assuming the plane accelerates uniformly the minimum force required is `(g =10ms^(-2))` .

Options

A. `2 xx10^(4)N`
B. `2.43 xx 10^(4)N`
C. `6.5 xx 10^(4)N`
D. `8.86 xx 10^(4)N`

Answer

C

Explanation

`F -mu_(k) mg = ma, v^(2) -u^(2) = 2as`