# VEX IQ. Extending a lever length for a harder hit on a ball when throwing it ProPreview

The length of the lever has a certain effect when hitting the ball. In this tutorial, I would like to discuss what it's the effect.

• #523
• 10 May 2017
• 1:30

### Speed of motion

The end of the lever moves much faster than the centre of the lever. If the lever is longer, the speed of its end point will be larger.

### VEX Ball Thrower With Rubber Bands

Building instructions for a VEX IQ attachment for throwing balls with rubber bands

### English

In this video I would like to stop at what's the effect of the length of the lever for hitting our ball? If I have the ball...

The first thing you can do is to increase the length of these levers. Now, it is kind of difficult for this attachment to increase the length because it's limited by the mission that we are trying to solve but generally if you have a lever and this lever rotates, you have one end of the lever moves much faster than the center of the lever. So, if you have a very very long lever, it will rotate very fast at the end of the lever and it will move very fast. This means that it will have a lot of energy and it will hit on the ball very hard. And this will make the whole ball move further and faster. So, what you can do is if you are solving such a problem where you are throwing the ball, you can try to increase the length of these levers with which you are hitting on the ball.