Homework Help: Physics

Posted by Ethan on Saturday, March 16, 2013 at 6:17pm.

An object is dropped from rest.
What is its instantaneous speed when it has
been in motion for 7 s? The acceleration of
gravity is 9.8 m/s
2
.
Answer in units of m/s

Physics - black_widow, Sunday, March 17, 2013 at 2:35am
Consider only vertical component (because the object does not move horizontally)
Use formula v=u+at
v=0+9.8(7)
v=68.6m/s

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