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

## Easy Java Simulations (2001- ) => Kinematics => Topic started by: Fu-Kwun Hwang on February 09, 2008, 07:33:38 pm

 Title: Projectile motion with equations Post by: Fu-Kwun Hwang on February 09, 2008, 07:33:38 pm Projectile motion: acceleration  a=-g is a constant in the vertical (y)direction. It means that Vy(t)=Vy(t=0)+a*t =Vy(t=0)-g*tThe average speed from 0 to t is equal to  (V(t=0)+V(t))/2= V(t=0)+a*t/2= V(t=0)-g*t/2  because velocity change linearly.So the distance traveled in y direction= average speed * t = V(t=0)*t - gt2/2 The distance traveled in x direction is Vx*t because velocity did not change in the horizontal direction.This applet let you play with projectile. You can adjust the initial (x,y) position of particle with mouse.Drag the red arrow to change the initial velocity.You can also change the above parameters with slider (x,y,vx,vy).Equation for projectile motion with your initial conditions are displayed.Click Initialize to reset time to zero and adjust new initial condition. The simulation will remember the last three traces.-*- Title: Re: Projectile motion with equations Post by: lookang on September 22, 2008, 08:22:36 am you might be interested in this projectile motion by lookang too.http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=745.0enjoy Title: Re: Projectile motion with equations Post by: TaraLaster on December 18, 2013, 11:33:10 am Quote from: Fu-Kwun Hwang on February 09, 2008, 07:33:38 pmProjectile motion: acceleration  a=-g is a constant in the vertical (y)direction. It means that Vy(t)=Vy(t=0)+a*t =Vy(t=0)-g*tThe average speed from 0 to t is equal to  (V(t=0)+V(t))/2= V(t=0)+a*t/2= V(t=0)-g*t/2  because velocity change linearly.So the distance traveled in y direction= average speed * t = V(t=0)*t - gt2/2 The distance traveled in x direction is Vx*t because velocity did not change in the horizontal direction.This applet let you play with projectile. You can adjust the initial (x,y) position of particle with mouse.Drag the red arrow to change the initial velocity.You can also change the above parameters with slider (x,y,vx,vy).Equation for projectile motion with your initial conditions are displayed.Click Initialize to reset time to zero and adjust new initial condition. The simulation will remember the last three traces.-*-Kinda! :)