Question

a car is initially stopped (at rest) at a red light.
(a) when the light turns green, the car accelerates along a straight line, reaching 25 m/s after 5 s.
calculate the acceleration of the car.
include units in your answer (put units in the second response box)
show your work in the space below
final answer: acceleration =
(b) show your work here. you must do this to earn full

Explanation:

Step1: Convert speed to m/s

First, convert 25 m/s? Wait, no, the speed is 25 m/s? Wait, the problem says "reaching 25 m/s after 5 s"? Wait, initial velocity \( u = 0 \, \text{m/s} \) (since it's initially at rest), final velocity \( v = 25 \, \text{m/s} \), time \( t = 5 \, \text{s} \). Use the formula \( a=\frac{v - u}{t} \).

Step2: Calculate acceleration

Substitute values: \( u = 0 \), \( v = 25 \, \text{m/s} \), \( t = 5 \, \text{s} \). So \( a=\frac{25 - 0}{5}=\frac{25}{5}=5 \, \text{m/s}^2 \).

Answer:

\( 5 \, \text{m/s}^2 \)