# Projectile Motion Help!

1. Oct 5, 2005

### navee

Hi im doing Projectile Motion questions can you please help me, The Activity is on this website here

The question are these

Set velocity to 40 m/s and angel to 20° and gravity to -9.8 and uncheck the drag box check mark.

1) What is the horizontal distance the cannon travels ----> I get 170 meters is that correct

2) Calculate the vertical velocity (V y-axis) of the ball. show the trig steps
-----> I get 13.7 meters is that correct

3) Calculate the howizontal velocity (V x-axis) of the ball. show the trig steps
-----> I get 37.6 meters is that correct

4) Determine the amount of time the ball is in the air

5) If the cannon is 1 m long, and the cannon ball has a mass of 15 kg, what is the force of the gunpowder on the cannon ball

Last edited: Oct 5, 2005
2. Oct 5, 2005

### hotvette

Do you have any equations of motion you are suppose to use? What have you tried?

3. Oct 6, 2005

### navee

like sin, or cos for determing the vix and viy and w/e