# Gravity Formula

What is the formula for a sprite to jump x blocks high? I need exactly x tiles high.

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@richard richard always brings this up on stream! but I can never remember it XD

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Yes, I can’t remember it either. I once new it, long ago… when there were dragons and ancient for- okay I’ll stop.

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what is the value of x?

Just x. You plug it into the formula.

x is used as a variable. Then they will technically plug some variables into a table
|||||||||||||X|||||f(x)

• f(1) | 200
• f(2) | 300
• f(3) | 400
• f(4) | 500
The equation for this problem: explicit formula: f(x)=100x+100
Recursive Formula: f(n)=f(n-1)+100
This is just an example.
X would be equal to how many tiles they jump
f(x) would be equal to what the velocity would be if they would jump. I guess it wouldn’t make sense if the velocity is 100 and it doesn’t jump a pixel.
It’s math but I don’t know the velocity either.
It’s a reason for a variable

Here’s the formula:

`JUMP_VELOCITY = - squareRoot(2 * GRAVITY * JUMP_HEIGHT)`

In blocks:

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