¿Qué trabajo realiza una fuerza de 15N cuando desplaza un cuerpo 13m en la dirección en que se aplicó?

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.

To find speed, or mph, use distance/time.