# physics

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A 109 kg fullback runs at the line of scrimmage.
(a) Find the constant force that must be exerted on him to bring him to rest in a distance of 1.1 m in a time interval of 0.22 s.
(b) How fast was he running initially?

someone answered this earlier but i do not understand how you got your answers since once needs to be in Newtons (part a) and the other in m/s (part b) Thanks!

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