Question

the formula

Answer 1

\[2\sqrt{5l}\] can be used to approximate the speed r of a car in mph of a car that has left a skid mark of length l in feet how far will a car skid at a speed of 60mph

Answer 2

\[v_f^2=v_i^2+2ax\]\[v^2=2ax=2\times 10 l\]
\[v=2\sqrt{5l}\]
the formular comes from here

Answer 3

\[60=2\sqrt{5l}\]
find l

Answer 4

\[\frac{ 60 }{ 2 }=\sqrt{5l}\]

Answer 5

square both sides and divide by 5