Answer
(a) (3) the force the blocks exert forward on him.
(b) $3.08\,m/s^{2}$
Work Step by Step
(a) (3) the force the blocks exert forward on him.
(b) The force exerted by the blocks on the sprinter must be equal to 200 N according to Newton's third law. Mass of the sprinter is 65 kg.
Acceleration $a=\frac{F}{m}=\frac{200\,N}{65.0\,kg}=3.08\,m/s^{2}$
