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A skier skies downhill 20 m along a 260 slope. If the skier reaches a final...

A skier skies downhill 20 m along a 260 slope. If the skier reaches a final speed of 29.1 m/s, what was the skiers starting speed (in m/s)? You may neglect friction.

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Answer #1

Given the final speed of the skier is v = 29.1m/s, the slope of the hill and the distance moved by the skier is L = 20m.

When an object slides down a frictionless inclined plane, the acceleration of the object is given by

So the acceleration of the skier is 4.3m/s^2.

If u is the initial speed of the skier, then by equations of motion

So the starting speed of the skier is 25.98m/s.

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