A car that starts from rest with a constant acceleration travels 50 m in the first 5 s. The car's acceleration is A) 2 m/s². B) 4 m/s². C) 10 m/s². D) 20 m/s².

Question

Quizplus · Accepted Answer

The distance covered by an object starting from rest with constant acceleration is given by the formula $d = \frac{1}{2}at^2$, where $d$ is the distance, $a$ is the acceleration, and $t$ is the time. Plugging in the given values (50 m for $d$ and 5 s for $t$), we get $50 = \frac{1}{2}a(5)^2$. Solving for $a$ gives $a = 4 \, m/s^2$.

A Car That Starts from Rest with a Constant Acceleration