# Vertical component of moving weight at a 45 degree angle

Here's an easier one. I use the leg press machine at the gym so I don't have to worrying about hurting myself while lifting heavier weight.

The weight glides on a track that looks to be 45 degrees.

What's the equation to figure out how much weight I would be able to squat normally. IE the vertical component of moving 400lbs at a 45 degree angle.

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400 * sin(45) = 283 –  Mike Dunlavey Nov 22 '11 at 21:06
If you can lift the weight, it means that $F>W_x$. Using trigonometry, $W_x = W\,\sin(\alpha)$, so you are doing that much force with your legs.