It is traveling at the end of 55.2 s in the speed of 2975,28m/s
acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. In this instance, you requested the speed and provided the time, acceleration, and speed. Speed is calculated as follows: speed = distance * time. Knowing the units for distance and time is necessary to calculate the units for speed. Since acceleration is equal to time, multiplying the two numbers equals speed. The formula would be:
Acceleration x Time Equals Velocity
Velocity: 53.9 m/s2 x 55.2
= 2975,28 m/s
Learn more about speed here-
https://brainly.com/question/28224010
#SPJ9