|Oct17-09, 12:39 AM||#1|
Velocity from Kinetic energy and work energy theorem
1. A 0.066 kg arrow is fired horizontally. The bowstring exerts an average force of 50 N on the arrow over a distance of 0.95 m. With what speed does the arrow leave the bow?
2. Work Energy Theorem = change in kinetic energy = (1/2*mass*Final Velocity^2)-(1/2*mass*Initial Velocity^2)
3. Since the initial speed is zero and the mass is given, I get a solution of 0, but that is most likely because I did the algebra wrong. I got an equation of Final Velocity = Square root (2*.066kg*0m/s)/(2*.066)
Which is clearly wrong. Where did I go wrong?
|Oct17-09, 01:37 AM||#2|
What is the work done on the arrow?
Equate it to the kinetic energy of the arrow and find the velocity.
|Similar Threads for: Velocity from Kinetic energy and work energy theorem|
|Work Energy Theorem, Kinetic Energy, and Tension||Introductory Physics Homework||12|
|Work-Energy theorem and kinetic energy pertaining to a car||Introductory Physics Homework||4|
|Model Airplane-Work-Energy Theorem and Kinetic Energy||Introductory Physics Homework||2|
|Kinetic Energy and Work Energy Theorem||Introductory Physics Homework||2|
|Work and Energy Theorem and Kinetic Energy||Introductory Physics Homework||4|