A 15Kg mass is accelerated from rest with a force of 100N. As it moves faster, friction and air resistance create an oppositely directed retarding force given by `F_(B) = A+ BV`. where `A = 25 N` and `B= 0.5 N/(m//s)`.
At what velocity m/s does the acceleration equal to one half of the initial acceleration ?

Options

A. `5 ms^(-1)`
B. `50 ms^(-1)`
C. `75 ms^(-1)`
D. `100 ms^(-1)`

Answer

B