Question

A water slide can be thought of as being frictionless. Let's say a slider starts from rest and goes down a slide that is 30 m long and is set at a 25 degree incline.

a) Determine the speed of the slider at the bottom of the slide.

b) Explain why you don't need to know the mass of the slider.
bobpursley
PE at top=KE at bottom
mgh=1/2 m v^2
mg30/sinTheta= 1/2 mv^2
solve for v.
sorry, what's mg?
bobpursley
mg is mass * acceleration due to gravity, mg is weight.
so i won't have a numerical answer?
bobpursley
yes,notice m divides out. You have to put the values of g and SinTheta to get the answer. I don't serve on silver platters (just blueplate).

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