Question

A car, initially at rest, travels from 0 m/s to 18.4 m/s in 27.8 s. What is the car's acceleration?

Answer 1

Take into account that the acceleration of the car can be calculated by using the following expression:

$a=\frac{v-v_o}{t}$

where,

vo: initial speed = 0m/s

v: final speed = 18.4m/s

t: time = 27.8s

Replace the previous values of the parameters into the formula for a and simplify:

$a=\frac{18.4\frac{m}{s}-0\frac{m}{s}}{27.8s}\approx0.66\frac{m}{s^2}$

Hence, the acceleration of the car is approximately 0.66m/s^2