Ten seconds after starting from rest, a car is moving at 40 m/s. What is the car's acceleration in meters per second per second?
A) 10
B) 40
C) 0.25
D) 4.0
E) 2.8

Question

Quizplus · Accepted Answer

The car's acceleration can be calculated using the formula $a = \frac{\Delta v}{\Delta t}$, where $\Delta v = 40 \, \text{m/s}$ (final velocity) - $0 \, \text{m/s}$ (initial velocity) = $40 \, \text{m/s}$, and $\Delta t = 10 \, \text{s}$. Thus, $a = \frac{40 \, \text{m/s}}{10 \, \text{s}} = 4.0 \, \text{m/s}^2$.

Ten Seconds After Starting from Rest, a Car Is Moving