Question

if you walk 450 m north and then 200 m south, what is your displacement? (a) 250 m (b) 250 m north (c) 650 m (d) 650 m north question 14 (1 point) a roller coasters accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. whats the acceleration? a) 24 m/s² b) 18 m/s² c) 16 m/s² d) 16 m/s

Explanation:

Step1: Recall the acceleration formula

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

Step2: Substitute the given values

Given \(u = 6.0\space m/s\), \(v=70\space m/s\), and \(t = 4\space s\).
Substitute into the formula: \(a=\frac{70 - 6}{4}=\frac{64}{4}\)

Step3: Calculate the value

\(\frac{64}{4}=16\space m/s^{2}\)

Answer:

C. \(16\space m/s^{2}\)