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#1 2007-10-29 20:38:08
- Mel
- Guest
help again..sorry
A body is initially at an origin, O, and at that instant has a velocity of 14m/s.
The acceleration, t seconds later, is (3t -11) m/s².
Find the velocity of the body when it is next at O.
Answer is -6m/s
#2 2007-10-30 00:39:22
- JaneFairfax
- Member
- Registered: 2007-02-23
- Posts: 6,868
Re: help again..sorry
So the body will be next at O at t = 4 s. Put this into the equation for v and find v.
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#3 2007-10-30 11:40:34
- Mel
- Guest
Re: help again..sorry
how do you know the body will be next at O at t = 4 s.
#4 2007-10-30 11:44:03
- JaneFairfax
- Member
- Registered: 2007-02-23
- Posts: 6,868
Re: help again..sorry
Set s = 0 and find t.
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