Question
A 0.052-kg arrow is fired horizontally. The bowstring exerts an average force of 80 N on the arrow over a distance of 0.75 m.
With what speed does the arrow leave the bow?
With what speed does the arrow leave the bow?
Answers
drwls
The average force multiplied by the 0.75 m distance is the work done on the arrow, and equals the kinetic energy of the arrow when it leaves the bow.
Therefore 80 x 0.75 = 60 J = (1/2) m V^2
You know what the arrow's mass (m) is; so solve for V
Therefore 80 x 0.75 = 60 J = (1/2) m V^2
You know what the arrow's mass (m) is; so solve for V
Anna
10.95 m/s