# Rate magnitude of vertical component

#### hulahoop09

A skier is moving at 85 km/hr straight down a tall mountain having a slope of 60 degrees. At what rate is the magnitude of the vertical component of his trip decreasing?

I just don't understand exactly how to find it. The wording doesn't make sense to me and I don't know where to start.

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#### tiny-tim

Homework Helper
Welcome to PF!

Hi hulahoop09! Welcome to PF!
A skier is moving at 85 km/hr straight down a tall mountain having a slope of 60 degrees. At what rate is the magnitude of the vertical component of his trip decreasing?

The wording doesn't make sense to me …
Yes, it's not the most straightforward way of describing it, is it?

The "vertical component of his trip" is simply his height (measured vertically, relative to something like sea-level).

"Magnitude" just means "size" … and could just as well have been left out completely!

So the question is really, at what rate is his height decreasing?

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