In the winter sport of bobsledding, athletes push their sled along a horizontal

Question

In the winter sport of bobsledding, athletes push their sled along a horizontal ice surface and then hop on the sled as it starts to careen down the steeply sloped track. In one event, the sled reaches a top speed of 9.2 m/s before starting down the initial part of the track, which is sloped downward at an angle of 4.0 degrees.

What is the sled's speed after it has traveled the first 100 m? Express your answer with the appropriate units.

In the winter sport of bobsledding, athletes push their sled along a horizontal ice surface and then hop on the sled as it starts to careen down the steeply sloped track. In one event, the sled reaches a top speed of 9.2 m/s before starting down the initial part of the track, which is sloped downward at an angle of 4.0° What is the sled's speed after it has traveled the first 100 m? Express your answer with the appropriate units. u,-1 Value Units

Explanation / Answer

Height of sloped track,

h = 100*sin4

h = 6.97 m

From consrrvation of energy,

(1/2)m(vf^2 - vi^2) = mgh

(1/2)vf^2 - 9.2^2 = 9.8*6.97

vf = 14.87 m/s

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