A truck at rest at a stoplight accelerates uniformly with acceleration a = 9 meters/second2 for 6.8 seconds after the light turns green. What is the speed of the truck in meters/second after that time interval?

To find the speed of the truck after the given time interval, we can use the formula:

v = u + a * t

where:
v = final velocity (speed of the truck)
u = initial velocity (speed of the truck at rest, which is 0 in this case)
a = acceleration
t = time interval

In this case, the acceleration (a) is given in the question as 9 meters/second^2, and the time interval (t) is given as 6.8 seconds.

Plugging in the values into the formula:

v = 0 + 9 * 6.8

v = 0 + 61.2

v = 61.2 meters/second

Therefore, the speed of the truck after the given time interval is 61.2 meters/second.