Question

a sliding crate has an initial velocity equal to 7 m/s. it moves across the floor and experiences friction causing it to reach a velocity of 2 m/s after 8 seconds. what is the acceleration of the block? if your answer is negative make sure to include a negative sign in your answer. (the negative sign should be placed directly in front of your first digit, \-3\ for instance would be correct, not \- 3\ with a space in between)

Explanation:

Step1: Identify the formula

The formula for acceleration is $a=\frac{v - u}{t}$, where $v$ is final - velocity, $u$ is initial - velocity, and $t$ is time.

Step2: Substitute the values

Given $u = 7$ m/s, $v = 2$ m/s, and $t = 8$ s. Substitute into the formula: $a=\frac{2 - 7}{8}$.

Step3: Calculate the acceleration

$a=\frac{- 5}{8}=-0.625$ m/s².

Answer:

-0.625