This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
Here's the solution to your problem. a) Calculate the acceleration in the first 4 seconds. Step 1: Determine the value of U. The total distance covered in the race is the area under the speed-time graph from t=0 to t=25 seconds. The total distance is given as 200\, m. The area consists of three parts: • Triangle from t=0 to t=4: (1)/(2) × 4 × U = 2U • Rectangle from t=4 to t=20: (20 - 4) × U = 16U • Triangle from t=20 to t=25: (1)/(2) × (25 - 20) × U = (1)/(2) × 5 × U = 2.5U Total distance = 2U + 16U + 2.5U = 20.5U. Given total distance is 200\, m: 20.5U = 200 U = (200)/(20.5) = (200)/(41)2 = (400)/(41)\, m/s Step 2