Jim stands beside a wide river and wonders how wide it is. he spots a large rock on the bank directly across from him. he then w
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We will use simple formula for velocity with constant acceleration.
and formula for path 
where:
v0 - initial velocity
a - constant acceleration
t- time
x - path
x0 - initial position
v0, and x0 are equal to 0 in this case, so we can simplify our formula to
and <u />
We can modify first formula to get time
and substitute it to second formula.
Now we can find acceleration
m/s
where:
v0 - initial velocity
a - constant acceleration
t- time
x - path
x0 - initial position
v0, and x0 are equal to 0 in this case, so we can simplify our formula to
We can modify first formula to get time
Now we can find acceleration