Can force affect the speed of an arrow leaving a bow?

[bishilany.1]

This problem is telling me that an arrow is shot from a bow with a speed of 20.5 m/s. THen asking if the average force exerted on the arrow were doubled with everything else staying the same, with what speed would the arrow leave the bow? I am just confused I thought it would stay the same? Can anyone help?

 

[cristo]

Welcome to PF. In future, please post problems like this in the homework forums. You must show your work before we can help you. Hint: are you familiar with the notion of an impulse?