an object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. which describes the…

an object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. which describes the acceleration?\nnegative acceleration of 4 m/s²\npositive acceleration of 4 m/s²\npositive acceleration of 9 m/s²\nnegative acceleration of 9 m/s²

an object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. which describes the acceleration?\nnegative acceleration of 4 m/s²\npositive acceleration of 4 m/s²\npositive acceleration of 9 m/s²\nnegative acceleration of 9 m/s²

Answer

Explanation:

Step1: Calculate the change in velocity

The change in velocity (\Delta v=v_f - v_i), where (v_f = 25\space m/s) and (v_i=65\space m/s). So (\Delta v=25 - 65=- 40\space m/s)

Step2: Calculate the acceleration

The formula for acceleration is (a=\frac{\Delta v}{\Delta t}). Given (\Delta t = 10\space s) and (\Delta v=-40\space m/s). Then (a=\frac{-40}{10}=-4\space m/s^{2})

Answer:

negative acceleration of (4\space m/s^{2})