Find x-component of a⃗ = (4.5 m/s2, negative x-direction).

The first thing you should do in this case is to write the vector acceleration in its vector form.

We have then:

a = lal * ( - i)

Substituting

a = l4.5l * ( - i) m / s ^ 2

rewriting:

a = - 4.5 * (i) m / s ^ 2

a = - 4.5 i m / s ^ 2

answer:

x-component of a⃗ is:

a = - 4.5 i m / s ^ 2