An object starts at rest in position A on the track shown, then slides to positi

Question

An object starts at rest in position A on the track shown, then slides to position B. Friction acts on the object over the entire track. Which equation can you use to find the object's velocity at position B?

Question 7 options:

mgy3 + Wfriction = mgy2

mgy2 + Wfriction = (1/2)mv2 + mgy1

mgy3 + Wfriction = (1/2)mv2

mgy3 + Wfriction = (1/2)mv2 + mgy2

Wfriction = (1/2)mv2 + mgy3 + mgy2

mgy3 = Wfriction + (1/2)mv2 - mgy2

mg(y3 - y2) = (1/2)mv2

Wfriction = (1/2)mv2 + mgy2

mgy3 + Wfriction = mgy2

mgy2 + Wfriction = (1/2)mv2 + mgy1

mgy3 + Wfriction = (1/2)mv2

mgy3 + Wfriction = (1/2)mv2 + mgy2

Wfriction = (1/2)mv2 + mgy3 + mgy2

mgy3 = Wfriction + (1/2)mv2 - mgy2

mg(y3 - y2) = (1/2)mv2

Wfriction = (1/2)mv2 + mgy2

Explanation / Answer

The equation(s) which we can use to find the object's velocity at position B are as follows:

  Option (d) mgy3 + Wfriction = (1/2)mv2 + mgy2

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