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Mathematics 21 Online
OpenStudy (anonymous):

2. An object is launched straight up. The object attains a height of 107 m after 2.50 s. a. What was the initial velocity? b. When (i.e. how long after launch) will the object have a speed of 20 m/s on the way back down?

OpenStudy (saifoo.khan):

\[Velocity=\frac{displacement}{time}\]

OpenStudy (saifoo.khan):

\[Velocity=\frac{107}{2.5}=42.8m/s\]

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