Question

question 2 (1 point)
if a car is traveling 10 m/s west and comes to a stop (0 m/s) in 3 seconds, what is the cars acceleration?
a = (vf - vi) ÷ t

a -0.3 m/s² west
b 0.56 m/s² west
c -3.3 m/s² west
d -3.3 m/s² east

Explanation:

Step1: Identify given values

$V_f = 0\ m/s$, $V_i=10\ m/s$, $t = 3\ s$

Step2: Substitute values into formula

$a=\frac{V_f - V_i}{t}=\frac{0 - 10}{3}=\frac{- 10}{3}\approx - 3.3\ m/s^2$
The negative sign indicates the direction is opposite to the initial - direction. Since the car was initially moving west, the acceleration is in the east direction.

Answer:

D. $-3.3\ m/s^2$ east