Question

A car moving on a straight road accelerates from a speed of $4.1m/s$ to a speed of $6.9m/s$ in $5s$. Its average acceleration is

• A. $0.5m/s^2$
• B. $0.6m/s^2$
• C. $0.56m/s^2$
• D. $0.65m/s^2$

Answer 1

The correct option is C $0.56m/s^2$

${\overrightarrow{a}}_{avg}=\frac{v_2-v_1}{t_2-t_1}=\frac{6.9-4.1}{5}=\frac{2.8}{5}=0.56m/s^2$