Question

A particle move with velocity $v_{1}$ for time $t_{1}$ and $v_{2}$ for time $t_{2}$ along a straight line. The magnitude of its average acceleration is

• A. $\frac{v_{2}-v_{1}}{t_{1}-t_{2}}$
• B. $\frac{v_{2}-v_{1}}{t_{1}+t_{2}}$
• C. $\frac{v_{2}-v_{1}}{t_{2}-t_{1}}$
• D. $\frac{v_{1}+v_{2}}{t_{1}-t_{2}}$

Answer 1

Answer: (B)

$a_{ avg }=\frac{v_{2}-v_{1}}{t_{1}+t_{2}}=\frac{\text { Change in velocity }}{\text { Time interval }}$