Question

a ball accelerates from 0.21m/s to 0.31m/s in 1.4 seconds. what was its acceleration? acceleration (m/s²) formula a = \\(\frac{v_f - v_i}{\delta t}\\) final velocity (m/s) - initial velocity (m/s) change in time (sec, min, hr) formula wheel \\(\frac{v_f - v_i}{a\times\delta t}\\) 0.07m/s² 0.14m/s² 0.37m/s²

Explanation:

Step1: Identify values

$v_f = 0.31m/s$, $v_i=0.21m/s$, $\Delta t = 1.4s$

Step2: Substitute into formula

$a=\frac{v_f - v_i}{\Delta t}=\frac{0.31 - 0.21}{1.4}$

Step3: Calculate

$a=\frac{0.1}{1.4}\approx0.07m/s^2$

Answer:

$0.07m/s^2$