SOLUTION: Hi, this problem was made up by trigonometry teacher, can you please help me. If a particle starting with an initial speed V0 has constant acceleration,a,then its speed after t

Algebra ->  Trigonometry-basics -> SOLUTION: Hi, this problem was made up by trigonometry teacher, can you please help me. If a particle starting with an initial speed V0 has constant acceleration,a,then its speed after t      Log On


   

Question 167475: Hi, this problem was made up by trigonometry teacher, can you please help me.
If a particle starting with an initial speed V0 has constant acceleration,a,then its speed after t seconds is given by V=V0+at. Find V0 and a if V= 28 mi/s when t=4. And then when V=43 mi/s and t=7s.
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
28=V%5B0%5D%2Ba%284%29 eq 1
43=V%5B0%5D%2Ba%287%29 eq 2
subtract 2nd equation values from 1st equation to eliminate V%5B0%5D
-15=-3a divide by -3 highlight%28a=5%29
plug a's value into either equation to find V%5B0%5D.
43=V%5B0%5D%2B7%285%29--->highlight%28V%5B0%5D=8%29