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The graph in Figure 5 shows how the velocity of a car changes with time - Edexcel - GCSE Physics - Question 3 - 2023 - Paper 1
Question 3
The graph in Figure 5 shows how the velocity of a car changes with time. The car starts from rest and travels along a level, straight road for 50 s. (i) Which part ... show full transcript
Worked Solution & Example Answer:The graph in Figure 5 shows how the velocity of a car changes with time - Edexcel - GCSE Physics - Question 3 - 2023 - Paper 1
Step 1
Which part of the graph shows when the car has constant velocity?
Answer
The constant velocity of the car is represented by the part of the graph that is a horizontal line. In this case, the segment QR (from point Q to R) indicates that the velocity remains unchanged at 20 m/s over that duration. Therefore, the correct answer is B: QR.
Step 2
Which part of the graph shows when the car has the greatest acceleration?
Answer
The greatest acceleration occurs when the velocity is increasing at the steepest rate. From the graph, this is observed in the segment from P to Q, where the car accelerates rapidly. Hence, the answer is A: PQ.