fnet= TX - Ff = ma
45N = 44.6N - 15N = (125N)(a)
45N = .237 = a
a=189.9m/s^2
Acceleration is a measure of the rate of change of an object's velocity over time. It can be described as the increase or decrease in an object's speed or direction.
Acceleration is calculated by dividing the change in velocity by the change in time. The formula for acceleration is a = (vf - vi) / t, where a is acceleration, vf is the final velocity, vi is the initial velocity, and t is the time interval.
The units of acceleration are typically meters per second squared (m/s^2) in the metric system, or feet per second squared (ft/s^2) in the imperial system. In both systems, acceleration can also be measured in other units, such as miles per hour squared (mph/s^2) or kilometers per hour squared (km/h^2).
Velocity is a measure of an object's speed and direction, while acceleration is a measure of how an object's velocity changes over time. In other words, velocity tells us how fast and in what direction an object is moving, while acceleration tells us how much an object's velocity is changing.
Acceleration can be observed in many everyday activities, such as a car speeding up or slowing down, a person jumping off a diving board, or a ball being thrown into the air. It is also present in more complex phenomena, such as the acceleration of a rocket during launch or the acceleration of an object due to the force of gravity.