A car travels a distance of 180 km in 3 hours. Calculate its speed. If it then travels an additional 250 km in the next 2 hours, is its overall motion uniform or non-uniform? Justify your answer.
First, let's calculate the speed for the initial journey: Speed = Distance / Time = 180 km / 3 hours = 60 km/h. For the second part of the journey: Speed = Distance / Time = 250 km / 2 hours = 125 km/h. The overall motion of the car is non-uniform. Justification: Uniform motion requires an object to cover equal distances in equal intervals of time, maintaining a constant speed. In this scenario, the car's speed changed significantly from 60 km/h in the first part to 125 km/h in the second part of its journey. Since its speed was not constant throughout the entire travel, the car's motion is classified as non-uniform motion.
Explanation
Correct calculation of speed for both parts, correct identification of motion type, and a clear justification based on the definition of uniform/non-uniform motion.