Question

a drag racer slows down from 150 m/s to 0 m/s in 50 s. what was the acceleration?
options: 3 m/s, 0 m/s, 3 m/s², -3 m/s²

Explanation:

Step1: Recall acceleration formula

The formula for acceleration \( a \) is \( a=\frac{v_f - v_i}{t} \), where \( v_f \) is final velocity, \( v_i \) is initial velocity, and \( t \) is time.

Step2: Identify values

Given \( v_i = 150\space m/s \), \( v_f = 0\space m/s \), \( t = 50\space s \).

Step3: Substitute into formula

Substitute the values into the formula: \( a=\frac{0 - 150}{50} \).

Step4: Calculate

Simplify the numerator: \( 0 - 150=- 150 \). Then divide by 50: \( a=\frac{-150}{50}=-3\space m/s^2 \).

Answer:

• 3m/s² (the option with -3m/s²)