# Find how long a marble rolls down a ramp, given distance and angle

**1. The problem statement, all variables and given/known data**

How many seconds does it take a marble to run down a ramp with a length of 5.0 m and an angle of 6.9°?

Correct answer = 2.9 s.

**2. Relevant equations**

v = at

d = 1/2at^{2}

**3. The attempt at a solution**

√2(5)/9.8≠2.9 s

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