Posted by **Jessica-- Please help!** on Tuesday, January 22, 2013 at 8:47pm.

A ball rolls off the edge of a balcony at 8.0 m/s. Find its speed after 3.8 s in the air. Use g = 10. m/s2

- Physics -
**Anonymous**, Tuesday, January 22, 2013 at 9:38pm
Vi=0, t=3.8s, a=g=10m/s^2, and Vf=?. Use Vf=Vi +at, which turns into Vf= (10m/s^2)(3.8s). Initial velocity in the y-direction is 0.

- Physics -
**Elena**, Wednesday, January 23, 2013 at 5:35am
v(x0) =v(x)=8 m/s

v(y0) =0

v(y)=gt=10•3.8=38 m/s

v=sqrt{v(x)² +v(y)²} =

=sqrt (8²+38²) = 38.8 m/s

- Physics -
**elisa**, Sunday, December 15, 2013 at 9:22pm
An autographed baseball rolls oﬀ of a 1.1 m

high desk and strikes the ﬂoor 0.15 m away

from the desk.

How fast was it rolling on the desk before

it fell oﬀ? The acceleration of gravity is

9.81 m/s

2

.

Answer in units of m/s

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