contestada

A body moving with uniform acceleration has a velocity of 13 cm/s when its x coordinate is 3.7 cm. If its x coordinate 2.27 s later is −6.3 cm, what is the x-component of its acceleration? Answer in units of cm/s 2 .

Respuesta :

Answer:

Acceleration, [tex]a=15.33\ m/s^2[/tex]

Explanation:

Initial speed of the body, [tex]u=13\ cm/s[/tex]

Initial position, [tex]x_i=3.7\ cm[/tex]

Final position, [tex]x_f=-6.3\ cm[/tex]

Time taken, t = 2.27 s

We need to find the x-component of its acceleration. Using second equation of kinematics as :

[tex]x_f-x_i=ut+\dfrac{1}{2}at^2[/tex]

[tex]-6.3-3.7=(13)(2.27)+\dfrac{1}{2}(2.27)^2a[/tex]

[tex]-10-29.51=\dfrac{1}{2}(2.27)^2a[/tex]

[tex]a=\dfrac{-39.51\times 2}{(2.27)^2}=-15.33\ m/s^2[/tex]

So, the x-component of its acceleration is [tex]15.33\ m/s^2[/tex]. The body is decelerating. Hence, this is the required solution.