Question

part 3 - acceleration calculations: for problems 11 - 13 use the acceleration formula to solve the following problems. show your work (formula, numbers with correct units and answer with correct units).

a = (final velocity - initial velocity)/time=(v_f - v_o)/t

1. a driver starts his parked car and within 5 seconds reaches a speed of 60 km/h, as he travels east. what is his acceleration?

equation:

plug numbers into the equation

final answer w/ units

Explanation:

Step1: Identify values

Initial velocity $v_o = 0$ km/h (car was parked), final velocity $v_f=60$ km/h, time $t = 5$ s. First convert km/h to m/s. $60$ km/h=$60\times\frac{1000}{3600}$ m/s=$\frac{50}{3}$ m/s.

Step2: Apply acceleration formula

$a=\frac{v_f - v_o}{t}=\frac{\frac{50}{3}-0}{5}$

Step3: Calculate acceleration

$a=\frac{\frac{50}{3}}{5}=\frac{50}{3}\times\frac{1}{5}=\frac{10}{3}$ m/s²

Answer:

$\frac{10}{3}$ m/s²