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## Homework Statement

A block moves 11 meters in 5 seconds on a straight line. Calculate the acceleration.

## Homework Equations

[itex]v^2_x=v^2_{0x}+2a_x(x-x_0)[/itex]

[itex]v_x=v_{0x}+a_xt[/itex]

[itex]x=x_{0}+v_{0x}t+\frac{1}{2}a_{x}t^2[/itex]

## The Attempt at a Solution

[itex]a_x=\frac{(\frac{11m}{5s})^2}{2\cdot 11m}=0.22m/s^2[/itex]

[itex]a_x=\frac{(\frac{11m}{5s})}{5s}=0.44m/s^2[/itex]

[itex]a_x=\frac{11m}{1/2\cdot (5s)^2}=0.88m/s^2[/itex]

Why am I getting 3 different answers? In my textbook, it lists the equations as being practically the same (straight-line motion with constant acceleration).