Answer:
Acceleration = 3 miles per sec²
Explanation:
A car is stopped at a red light that means speed of the car 'u' = 0
As the light turns green, speed of the car increases from 0 to 45 miles per hour,
v = 45 miles per hour
Duration for the increase in speed from 0 to 45 miles per hour is,
t = 15 seconds
By using formula to calculate the acceleration,
v = u + at
45 = 0 + a×15
a = [tex]\frac{45}{15}[/tex]
= 3 miles per sec²
Therefore, acceleration of the car is 3 miles per sec².
