Question

a physics student is slowing down on her skateboard. she starts at a speed of 5.5 m/s and slows to 1.0 m/s over a time of 3.0 seconds. what is the skateboards acceleration? -1.5 m/s² 8.5 m/s² -2.5 m/s²

Explanation:

Step1: Escribir la fórmula de aceleración

$$a=\frac{v_{f}-v_{i}}{t}$$

Step2: Sustituir valores

$$a=\frac{1.0 - 5.5}{3.0}$$

Step3: Calcular

$$a=\frac{-4.5}{3.0}=-1.5\ \frac{m}{s^{2}}$$

Answer:

$-1.5\ \frac{m}{s^{2}}$