Net external force

Timo is an amateur athlete hoping to make it into world-class competitions. At the moment he...
Timo is an amateur athlete hoping to make it into world-class competitions. At the moment he is able to start sprinting with an initial acceleration of 6.25 m/s2 Assuming his mass is 67 kg; calculate the net external force on Timo as he sets off the blocks. Select one: O A. 657.27 N O B. 61.31 N-m O C. 4.108 KN 0 D. 416.75 N