SOLUTION: An antelope moing with constant acceleration covers the distance between two points 70.0m apart in 7.00 s.Its speed as if passes the second point is 15.0 m/s (a) what is its speed

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Question 1040734: An antelope moing with constant acceleration covers the distance between two points 70.0m apart in 7.00 s.Its speed as if passes the second point is 15.0 m/s (a) what is its speed at the first point? (b) what its acceleration ?

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
d=70
t=7
v%5B2%5D=15
.
.
.
For constant acceleration,
d=%28%28v%5B1%5D%2Bv%5B2%5D%29%2F2%29%2At
Substituting,
70=%28%28v%5B1%5D%2B15%29%2F2%29%2A7
%28v%5B1%5D%2B15%29%2F2=10
v%5B1%5D%2B15=20
v%5B1%5D=5m%2Fs
.
.
.
v%5B2%5D=v%5B1%5D%2Ba%2At
15=5%2Ba%2A7
7a=10
a=10%2F7m%2Fs%5E2