# NTNUJAVA Virtual Physics LaboratoryEnjoy the fun of physics with simulations! Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/

## Easy Java Simulations (2001- ) => dynamics => Topic started by: ahmedelshfie on May 31, 2010, 06:02:37 pm

 Title: falling with air resistance Post by: ahmedelshfie on May 31, 2010, 06:02:37 pm This applet is falling with air resistanceCreated by prof Hwang Modified by AhmedOriginal project requesting for simulations for object falling with air resistance/board:26-100- (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1536.0)What will happen if there are many objects with the same density but different size, all fall from the same height.The terminal velocity $v=\sqrt{mg/b}=\sqrt{\rho Vg/b}$, so the terminal velocity is proportiobal to $\sqrt{V}$ where $V$ is the volume of the object.The following simulation try to illustrate the size effect on terminal velocity.The ratio of the mass for the object is 1:2:3:4:5:6:7:8:9Because it is a 2D simulation, the radius is proportional to $\sqrt{m}$.You can try it with different gravity g , or drag constant (Drag force = bv2)